PRODUCTS

Choose your
product type.

Start with the format you need. You can request current photos, details and pricing from the product page.

---

RAW MATERIAL

EXPORT READY

Natural Stone Blocks

Premium natural stone blocks selected for international export.

Explore Collection

---

PROJECT-READY STONE

EXPORT READY

Cut-to-Size Stone

Precision-cut natural stone for architectural and commercial projects.

Explore Collection

Onyx Slab Supplier

Sourcing Natural Onyx Slabs for International Architectural and Interior Projects

An Onyx Slab Supplier is not simply a company that offers polished stone panels for sale. In professional international stone procurement, the supplier’s role begins much earlier—at material identification, source selection, block evaluation, slab production, visual control, finishing, packing and export coordination.

This distinction becomes particularly important when the material is natural onyx.

Onyx is among the most visually distinctive natural stones used in architectural interiors. Its value is often associated not only with its color but with the interaction between translucency, mineral structures, bands, clouds, veins, layers and the way the stone responds to transmitted light. As a result, buying onyx slabs is fundamentally different from purchasing an industrially uniform surface material.

For an importer, fabricator, distributor or project buyer, the real question is therefore not simply whether a supplier has “onyx slabs.” The important questions are more specific:

What is the actual stone and source?

How consistent is the material from slab to slab?

How was the block selected and sawn?

What is the slab thickness and finished size?

How transparent or translucent is the material?

How have natural cavities or discontinuities been treated?

What finish has been applied?

Can the supplier provide sequential slabs from the same block?

Can visual evidence be matched to the actual production?

How will the slabs be protected for international transportation?

And perhaps most importantly, can the supplier maintain a clear commercial and quality-control process from source to shipment?

These questions define professional onyx procurement.

What Is an Onyx Slab Supplier?

An Onyx Slab Supplier is a company or sourcing organization that provides processed natural onyx slabs to professional buyers. Depending on its business model, the supplier may be a stone manufacturer, processor, exporter, quarry-linked producer, distributor or specialized international procurement company.

These roles should not automatically be treated as interchangeable.

A quarry owner controls extraction from a geological source.

A manufacturer or stone processor converts raw blocks into slabs through sawing, calibration, resin treatment, polishing and other production operations.

An exporter manages the commercial and logistical side of international shipments.

A trading or procurement company may source suitable material from established production networks and coordinate selection, quality control, commercial terms, documentation and logistics without owning the quarry or manufacturing plant.

For buyers, understanding this distinction is useful because the commercial relationship should match the actual responsibility of the supplier.

ALPREY operates as a specialized international procurement and trading house rather than presenting itself as a quarry owner or mining operator. The objective is to connect international buyers with suitable Iranian natural stone production sources, coordinate material selection and quality requirements, and organize the commercial and export process around the buyer’s specification.

That distinction is particularly relevant for natural onyx because availability, appearance and block characteristics can vary significantly from one geological source or production lot to another.

Why Onyx Slabs Require a Different Procurement Approach

Onyx is frequently selected because of its visual character rather than because it is simply another dimension stone.

Depending on geological origin and variety, natural onyx can display:

• Translucent backgrounds
• Parallel or irregular bands
• Cloud-like mineral structures
• White, cream, honey, beige, green, brown or other tones
• Strong directional movement
• Fine or dramatic veining
• Layered structures
• Variable degrees of transparency
• Natural cavities or internal features
• Distinctive patterns revealed by sawing

These characteristics make every block a material-selection problem.

A buyer who purchases ordinary commercial slabs based primarily on dimensions and price may discover that the delivered material does not create the visual continuity expected by an architect or interior designer.

With onyx, the block itself matters.

The sawing direction matters.

The slab sequence matters.

The surface treatment matters.

The lighting environment matters.

The relationship between adjacent slabs matters.

This is why professional Onyx Slab Supplier selection should be based on both technical and visual criteria.

Natural Onyx Is Not an Artificially Uniform Material

One of the most important principles in natural stone procurement is that variation should not automatically be classified as a defect.

Natural stone is geological material. Its color, texture, mineral distribution, veining and internal structure can vary within the same quarry and sometimes within the same block.

A professional buyer should therefore distinguish between:

Natural variation

and

Manufacturing or handling defects.

Natural variation may include changes in tone, vein intensity, mineral pattern or translucency.

Manufacturing-related concerns may include unacceptable surface damage, poorly executed filling, improper polishing, dimensional problems, cracks caused or aggravated during processing, edge damage or unsuitable packing.

This distinction should be established before production begins.

A written specification, approved reference slab, digital selection record and clear acceptance criteria can substantially reduce disagreements between buyer and supplier.

ASTM C1528/C1528M-26 is specifically intended to guide architects, engineers, specifiers, contractors and material suppliers in the selection of dimension stone and emphasizes that stone must be considered together with the other components and requirements of the building application.

Selecting the Right Onyx Block Before Slab Production

For premium onyx projects, slab quality begins before the block reaches the gang saw or slab-processing line.

The block should first be evaluated for its intended application.

Important considerations include:

Block dimensions

Larger blocks can provide greater flexibility for producing large-format slabs and maintaining visual continuity.

However, block size alone does not determine commercial value.

Internal structure

The internal structure of the block can influence slab yield, visual consistency and the location of natural features.

Vein direction

The orientation of the geological structure relative to the cutting direction can dramatically change the appearance of the finished slab.

Color distribution

A block with a desirable dominant background but excessive internal variation may behave differently from a visually consistent block.

Natural openings and discontinuities

These must be assessed in relation to the intended slab application and subsequent treatment.

Expected recovery

The theoretical block volume is not the same as the commercially usable slab area. Sawing losses, edge trimming, natural discontinuities, finishing allowances and quality sorting all influence actual recovery.

For a professional buyer, asking about expected recovery can therefore be more meaningful than looking only at the gross block dimensions.

Vein Direction and the Visual Identity of Onyx Slabs

One of the most important decisions in onyx processing is the relationship between the geological structure and the sawing direction.

Different cutting orientations can reveal substantially different visual patterns.

A directional structure may produce elongated bands in one orientation and a more cloud-like or cross-sectional pattern in another.

This is why an experienced Onyx Slab Supplier should be able to communicate not only the name of the stone but also the production logic behind the slabs.

For large interior projects, the buyer may need:

• Sequential slabs
• Same-block production
• Controlled orientation
• Matching background tones
• Bookmatching potential
• Specific vein direction
• Large-format slabs
• Consistent finishing

The slab should therefore be treated as part of a visual system rather than as an isolated commodity.

Bookmatching and Symmetrical Onyx Applications

Few natural stones demonstrate the importance of bookmatching as strongly as translucent or strongly veined onyx.

When slabs are produced from the same block and arranged in sequence, the natural pattern can sometimes be positioned to create a mirrored or continuous visual composition.

This technique is frequently considered for:

• Feature walls
• Hotel reception areas
• Luxury residential interiors
• Bar fronts
• Lobby walls
• Backlit panels
• Elevator surrounds
• Decorative partitions
• High-end retail interiors

However, bookmatching should never be promised simply because a stone is visually attractive.

The suitability depends on the block structure, sawing direction, slab sequence, production quality and the actual pattern revealed during processing.

A responsible supplier should therefore show the buyer the actual production sequence whenever the project requires a matched installation.

Translucency: One of the Defining Characteristics of Onyx

The relationship between onyx and light is one of the reasons this material is selected for architectural interiors.

Certain onyx varieties can transmit light to a degree that creates an entirely different appearance compared with conventional opaque stone.

The final visual effect depends on several factors, including:

• Stone thickness
• Natural mineral structure
• Background color
• Internal density
• Degree of translucency
• Slab treatment
• Lighting intensity
• Light source positioning
• Backing and installation system

A slab that appears relatively subdued under conventional showroom lighting may behave very differently when illuminated from behind.

For this reason, an Onyx Slab Supplier should ideally provide both ordinary surface photographs and, where relevant, photographs showing the material under controlled backlighting.

The buyer should understand that photography cannot perfectly reproduce the behavior of natural translucent stone under every lighting condition.

For major projects, physical samples remain valuable.

Onyx Slab Finishes

The final surface treatment affects the appearance, tactile quality and application of an onyx slab.

Depending on the material and production line, possible finishes may include:

Polished Onyx

Polishing produces a reflective surface and can intensify color, contrast and visual depth.

Polished onyx is frequently considered for feature walls, furniture surfaces, decorative interiors and high-end architectural applications.

Honed Onyx

A honed surface reduces reflectivity and creates a softer visual effect.

This can be appropriate where the design requires less gloss.

Brushed or Textured Finishes

Where technically appropriate, textured finishes can provide a different tactile and visual character.

The suitability depends strongly on the particular onyx variety and intended use.

The finish should therefore be specified as part of the procurement requirement rather than selected after the commercial agreement has already been established.

Thickness and Slab Dimensions

Thickness is a fundamental part of an onyx slab specification.

The required thickness may depend on:

• Fabrication method
• Installation system
• Application
• Panel dimensions
• Structural requirements
• Backing system
• Handling requirements
• Project specifications

Large-format slabs also require careful attention to flatness, edge condition, handling and packaging.

A buyer should request the actual nominal thickness, dimensional tolerances and finishing specifications rather than relying on a general statement such as “standard slab.”

Where the project has strict dimensional requirements, the final specification should be agreed before production.

Resin Treatment, Filling and Surface Preparation

Natural onyx may contain cavities, micro-openings or structural features that become more apparent during processing.

Depending on the material and production requirements, slabs may undergo filling or resin treatment.

These treatments can improve surface continuity and help stabilize certain natural features, but they should not be presented as changing the geological identity of the stone.

For procurement purposes, the buyer should establish:

• Whether the slab is filled
• Whether resin treatment is used
• Which surfaces are treated
• Whether color-enhancing treatment is applied
• Whether the treatment is visible under transmitted light
• Whether the treatment is compatible with the intended application

The objective is not to eliminate every natural characteristic.

The objective is to produce a commercially appropriate surface while maintaining an honest representation of the natural material.

Technical Evaluation of Onyx Slabs

Visual appearance is critical for onyx, but professional procurement should not stop at visual inspection.

Natural stone selection may also involve physical and technical characteristics appropriate to the intended application.

ASTM C97/C97M-26 provides test methods for absorption and bulk specific gravity of dimension stone and notes that these tests can indicate differences in absorption among dimension stones and provide an element for comparing stones of the same type.

Depending on the application, technical documentation may therefore include relevant information concerning:

• Water absorption
• Bulk specific gravity
• Density
• Strength characteristics
• Flexural performance
• Abrasion considerations
• Petrographic characteristics
• Dimensional properties

Not every parameter is equally important for every onyx application.

A decorative interior wall, a countertop, a floor installation and a specialized architectural assembly may require different evaluation criteria.

The correct approach is to match the technical specification to the actual use.

ASTM Standards and Professional Stone Selection

ASTM standards provide useful frameworks for evaluating natural stone, but they should not be treated as a substitute for project-specific engineering and specification.

ASTM C1528/C1528M-26 is a current guide for selection of dimension stone and applies to professionals involved in designing, selecting, specifying, installing, purchasing, fabricating and supplying natural stone.

ASTM C503/C503M-23 is the current active ASTM specification for marble dimension stone and covers material characteristics, physical requirements and sampling for marble used in general building and structural purposes.

Because commercial “onyx” terminology can encompass different geological materials and market classifications, the exact petrographic identity and project specification should be established rather than assuming that every stone sold under the word “onyx” falls under one universal technical category.

This is particularly important for international procurement.

A professional supplier should be able to communicate what is actually being supplied.

Quality Control at the Slab Stage

Quality control should be performed at multiple points rather than only immediately before shipment.

A practical onyx slab QC process may include:

1. Block verification

Confirm the selected block or source corresponds to the approved material.

2. Production monitoring

Review sawing direction, slab sequence and production progress.

3. Surface inspection

Inspect the finished surface for polishing quality, resin treatment, visible damage and unacceptable imperfections.

4. Dimensional inspection

Check thickness, length, width and relevant dimensional tolerances.

5. Visual classification

Sort slabs according to agreed commercial criteria.

6. Sequential slab control

Where matching is required, confirm that slabs belong to the required block or production sequence.

7. Final photography

Photograph the actual finished slabs before packing.

8. Packing inspection

Verify protection of polished faces, corners and edges before loading.

This layered approach is more reliable than simply receiving a few photographs and assuming that the entire shipment will be identical.

What Should an Onyx Slab Inspection Report Contain?

For an international B2B shipment, the inspection record can include:

• Stone name
• Commercial variety
• Source information where commercially disclosable
• Block reference
• Slab reference
• Quantity
• Dimensions
• Thickness
• Finish
• Visual observations
• Natural characteristics
• Treatment information
• Photographs
• Packing condition
• Loading photographs
• Shipment identification

For larger or technically sensitive projects, an independent inspection organization may also be engaged.

The purpose is not to create unnecessary paperwork.

It is to establish traceability between the material requested by the buyer and the material physically shipped.

Onyx Slab Supplier for Importers and Distributors

Importers and distributors usually need a supplier who can provide more than individual slabs.

They need commercial repeatability.

That may involve:

• Defined material varieties
• Consistent specifications
• Production planning
• Commercial quotations
• Packing standards
• Shipment coordination
• Documentation
• Repeat-order communication
• Visual records
• Clear acceptance criteria

For a distributor, one shipment may become the reference for future orders.

Therefore, the ability to reproduce a material profile can be more commercially important than a single visually impressive slab.

This is why source identification, block selection and production records matter.

Onyx Slabs for Stone Fabricators

Fabricators often evaluate onyx differently from general importers.

Their concerns can include:

• Slab thickness
• Flatness
• Edge quality
• Resin treatment
• Internal features
• Cutting behavior
• Matching
• Bookmatching
• Seam positioning
• CNC compatibility
• Panel dimensions
• Waste and yield

A supplier who understands fabrication requirements can communicate much more effectively with a professional stone workshop.

For custom projects, the supplier should receive a clear fabrication brief before production whenever possible.

Onyx Slabs for Hotels, Hospitality and Luxury Interiors

Onyx is frequently considered for spaces where the material itself is intended to become a visual focal point.

Potential applications include:

• Hotel reception desks
• Lobby walls
• Feature walls
• Restaurant interiors
• Bar counters
• Decorative columns
• Luxury residential interiors
• Retail displays
• Spa interiors
• Backlit architectural panels
• Decorative furniture

The procurement strategy should change according to the application.

A feature wall may prioritize visual continuity.

A backlit panel may prioritize translucency.

A high-traffic surface may require greater attention to technical performance and maintenance.

A furniture application may require careful fabrication and edge treatment.

The supplier therefore needs to understand the intended application before recommending a material.

Iranian Onyx Slabs for International Buyers

Iran is associated with a wide range of natural stone resources, including commercially traded onyx varieties.

Iranian onyx can be particularly interesting for buyers looking for distinctive decorative stone with strong visual movement, translucent characteristics or specific color families.

However, “Iranian onyx” should never be treated as one uniform material.

Different sources can exhibit different:

• Colors
• Vein structures
• Transparency
• Background tones
• Mineral patterns
• Block sizes
• Production characteristics

For an international buyer, the commercial specification should therefore identify the actual material rather than relying exclusively on the country-of-origin label.

The practical procurement question is:

Which Iranian onyx, from which source, in which block, processed to which specification?

That is the level of precision required for professional sourcing.

Beige, Cream, White and Other Onyx Varieties

Onyx is commercially available in a broad visual range.

Depending on geological source, buyers may encounter:

• White onyx
• Cream onyx
• Beige onyx
• Honey onyx
• Golden onyx
• Green onyx
• Brown onyx
• Multicolor onyx

Color names should always be treated as commercial descriptors rather than universal technical classifications.

Two stones with the same commercial color name can behave very differently visually.

For this reason, an experienced Onyx Slab Supplier should rely on actual photographs, physical samples, production records and clearly defined material references rather than color names alone.

How to Evaluate an Onyx Slab Supplier

Before placing an international order, buyers should evaluate the supplier across several dimensions.

Material knowledge

Does the supplier understand the difference between geological material, commercial variety and finished product?

Source transparency

Can the supplier explain where the material is sourced and how the production relationship works?

Visual documentation

Can the supplier provide photographs of actual material rather than generic catalog images?

Production control

Can the supplier coordinate block selection and slab production?

Technical information

Can relevant technical characteristics be documented where required?

Quality control

Is there a defined inspection procedure?

Commercial clarity

Are quantity, dimensions, finish, price basis, packing and Incoterms clearly specified?

Export capability

Can the supplier coordinate international documentation, packing and shipment?

Communication

Can the supplier communicate clearly throughout production rather than only at quotation stage?

These criteria help distinguish an actual procurement partner from a seller simply advertising stone images online.

Onyx Slab Pricing: What Actually Determines Cost?

There is no universal price for an onyx slab.

Commercial pricing can be influenced by:

• Material variety
• Geological source
• Block quality
• Block size
• Visual selection
• Slab thickness
• Slab dimensions
• Translucency
• Pattern
• Veining
• Surface finish
• Resin treatment
• Production yield
• Sorting requirements
• Quantity
• Packing
• Inspection
• Origin and destination
• Incoterms
• Freight
• Insurance
• Import duties and local charges

A professional RFQ should therefore contain enough information for the supplier to quote the same product basis.

Comparing two prices without comparing specifications can produce a misleading result.

A slab priced lower per square meter may have different dimensions, thickness, finish, selection grade or visual characteristics.

FOB, CFR and CIF for Onyx Slab Procurement

International buyers may request quotations under different Incoterms.

For example:

FOB can be appropriate when the buyer controls the main international freight.

CFR includes the cost and freight to the named destination port, while insurance is handled separately by the buyer.

CIF includes cost, insurance and freight to the named destination port.

The commercial quotation should always state the named place or port and the applicable Incoterm version.

A supplier quotation without a clear delivery basis is incomplete for serious international comparison.

The buyer should also calculate the complete landed cost, including:

• Stone price
• Export handling
• Inland transportation
• Port charges
• Ocean freight
• Insurance where applicable
• Customs duties
• Destination charges
• Broker fees
• Local transportation
• Taxes
• Fabrication losses

This is particularly important when comparing suppliers from different origins.

Packaging and International Transportation of Onyx Slabs

Onyx slabs require careful handling because polished surfaces, corners and edges can be vulnerable during transportation.

Professional packing may involve suitable frames, protective materials, separators and secure loading arrangements appropriate to the shipment.

The packing method should consider:

• Slab orientation
• Weight distribution
• Edge protection
• Surface protection
• Moisture exposure
• Container loading
• Movement during transportation
• Forklift handling
• Unloading requirements

Loading photographs are also useful for documentation.

For a commercial buyer, packing is not an afterthought. It is part of product quality preservation.

The Difference Between a Catalog Seller and a Professional Onyx Slab Supplier

A catalog can show beautiful stone.

A professional supplier must manage what happens after the buyer says:

“I want this exact material.”

That means translating visual expectations into a production specification.

The supplier should be able to discuss:

• Actual source
• Available blocks
• Slab sequence
• Dimensions
• Thickness
• Finish
• Treatment
• Quality classification
• Inspection
• Packing
• Delivery terms

This is the difference between marketing a stone and managing a stone procurement process.

For international buyers, that difference can have significant commercial consequences.

ALPREY as an International Onyx Procurement Partner

ALPREY approaches Iranian natural stone procurement as an international sourcing and trading process rather than simply an online stone catalog.

The company operates as a specialized procurement and trading house and does not present itself as a quarry owner, physical mining operator or mining joint-venture company.

For suitable requirements, ALPREY works through sourcing relationships and long-term off-take arrangements with Iranian production sources.

For onyx slab procurement, the process can be structured around the buyer’s actual requirement:

Material identification → source evaluation → block selection → production specification → slab processing → quality control → visual documentation → packing → export coordination.

This model is particularly relevant when the buyer is not simply looking for a random stock slab but needs a defined material for an architectural or commercial project.

From Sample Approval to Commercial Shipment

For new buyers, a trial order can be a practical way to establish the working relationship.

A trial shipment allows the buyer to evaluate:

• Actual material
• Color consistency
• Surface finish
• Packaging
• Communication
• Documentation
• Delivery performance
• Quality-control process

If the material and commercial process meet the agreed requirements, future orders can be structured around a more precise specification.

For larger projects, an approved sample or approved reference slab can become the visual benchmark for subsequent production.

However, because natural stone varies, the reference should define acceptable variation rather than imply that every future slab will be literally identical.

What an International Onyx Slab RFQ Should Include

A professional request for quotation should ideally include:

Stone: Onyx
Form: Slabs
Color/variety: Specify preferred appearance
Thickness: Required thickness
Dimensions: Preferred slab dimensions
Finish: Polished, honed or other
Quantity: Square meters or slab count
Application: Wall, furniture, hospitality, residential, etc.
Matching: Required / not required
Bookmatching: Required / not required
Backlighting: Yes / no
Quality criteria: Define acceptable natural characteristics
Delivery basis: FOB, CFR, CIF or other
Destination: Named port/place
Inspection: Buyer inspection or independent inspection if required
Documentation: Technical and commercial documentation required

The more precise the RFQ, the more meaningful the quotation becomes.

Why Visual Evidence Matters in Onyx Procurement

A single polished photograph is not enough to evaluate a commercial onyx order.

A more useful visual package may include:

• Full slab photographs
• Multiple viewing angles
• Dry surface photographs
• Close-up photographs
• Edge photographs
• Backlit photographs where relevant
• Slab sequence photographs
• Block photographs where available
• Production photographs
• Loading photographs

The purpose is not to replace physical inspection.

It is to create a stronger documentary connection between the material discussed during negotiation and the material actually produced.

For high-value projects, independent inspection remains an option when the buyer requires third-party verification.

Natural Variation and Buyer Expectations

The strongest B2B relationships in natural stone are based on realistic expectations.

A supplier should not promise absolute visual uniformity where the material is naturally variable.

At the same time, “natural variation” should not become a blanket explanation for every quality problem.

A professional procurement agreement should distinguish between:

Expected geological variation

and

Non-conformity with the agreed commercial specification.

That distinction creates a much more useful framework for both buyer and supplier.

It also protects the integrity of the natural material.

Onyx Slabs for Long-Term B2B Supply

For distributors, fabricators and recurring project buyers, the objective may not be a single shipment.

It may be a repeatable sourcing channel.

A long-term supply relationship can be structured around:

• Defined material references
• Source information
• Approved visual standards
• Production specifications
• Quantity planning
• Quality-control procedures
• Inspection requirements
• Packing standards
• Commercial terms
• Shipment schedules

The more clearly these elements are documented, the easier it becomes to manage subsequent orders.

This is particularly important when an architectural material is being incorporated into multiple projects or a distributor is developing a commercial product line around a particular stone.

Choosing an Onyx Slab Supplier for Your Project

The right procurement decision begins with understanding exactly what the project requires.

If the objective is a dramatic feature wall, visual pattern and slab sequence may dominate the selection.

If the objective is a backlit installation, translucency and light behavior become critical.

If the material is intended for fabrication, slab thickness, treatment, internal structure and dimensional quality become more important.

If the buyer is a distributor, repeatability and documentation may become the central issue.

There is therefore no single specification for every onyx purchase.

The correct specification is the one that connects the geological material, fabrication process and architectural application.

A Professional Approach to Iranian Onyx Sourcing

International natural stone procurement works best when the buyer and supplier speak in terms of material, specification and process rather than vague commercial descriptions.

For Iranian onyx slabs, this means identifying the desired material, evaluating available sources, selecting suitable blocks, defining the cutting and finishing requirements, documenting the actual production and arranging export according to the agreed commercial terms.

That is the foundation of professional sourcing.

ALPREY’s role is to provide an independent procurement and commercial coordination layer between international buyers and Iranian natural stone production sources.

The objective is straightforward:

clear material identification, disciplined procurement, documented quality control and reliable export coordination.

For importers, distributors, fabricators, architects and project buyers seeking Iranian onyx slabs, the starting point should therefore not be a generic catalog.

It should be a clearly defined procurement brief.

Request an Onyx Slab Sourcing Proposal

If you are looking for an Onyx Slab Supplier for an international project, distribution program or fabrication requirement, provide the material preference, slab dimensions, thickness, finish, quantity, intended application and destination.

The sourcing process can then be structured around the actual requirement rather than a generic stone listing.

Where suitable material is identified, the commercial process can proceed through source evaluation, production coordination, quality control, visual documentation, packing and export arrangements.

Natural stone deserves to be treated as a material with geological identity—not simply as a commodity measured by square meters.

Clarity for the buyer. Discipline for the process. Respect for the material.