Iran Onyx Stone Blocks Wholesale Export: Suppliers Guide
Published February 1, 2025 · StoneBuySell Export Desk
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Iran Onyx Stone Blocks Wholesale Export: Suppliers Guide
Onyx is one of the rarest and most valuable natural stones exported from Iran. Unlike travertine and marble, which are produced in massive volumes from dozens of quarries, onyx is quarried in limited quantities from specific geological formations scattered across the central provinces. Its translucency, rich colors, and rarity make it a premium material for luxury interiors, backlit feature walls, and high-end architectural projects. This guide covers everything wholesale buyers need to know about sourcing Iranian onyx blocks — from understanding the different varieties and their quarry origins to evaluating quality, negotiating FOB Bandar Abbas pricing, and managing the specialized handling that onyx demands throughout the export process.
Iranian Onyx Varieties and Their Characteristics
Iran produces four main onyx varieties, each with distinct visual and physical properties. Green onyx, the most iconic, ranges from deep emerald to light sage with white or brown banding; it is quarried primarily in the Kerman province and is the highest-priced variety due to strong demand from Middle Eastern and European luxury markets. Honey onyx features warm amber and golden tones with translucent banding, popular for bar tops, reception desks, and backlit panels; its main quarries lie in the Isfahan region. White onyx, with its milky, semi-translucent background and subtle gray or gold veining, is favored for minimalist luxury interiors and commands premium prices when color purity is high. Multi-color onyx, which blends green, brown, white, and rust bands in a single block, is the most visually dramatic and is often used for statement feature walls.
All Iranian onyx is technically a banded chalcedony — a microcrystalline silica — rather than calcite-based marble, which gives it greater hardness (Mohs 6.5–7) and resistance to acid etching. This hardness also means onyx takes an exceptional polish, achieving a glass-like surface that maximizes its translucency when backlit. Bulk density typically ranges from 2.55 to 2.65 g/cm³, slightly lighter than marble, which is an advantage for vertical cladding applications where weight matters.
Where Iranian Onyx Is Quarried
Onyx deposits in Iran are geologically scattered and small compared to the country’s massive travertine and marble formations. The most active onyx quarries are located in Kerman province, where green onyx is extracted from narrow veins in volcanic host rock. Isfahan province supplies the majority of honey and white onyx, with several small to medium quarries operating around the city of Isfahan and in nearby mountainous areas. Additional onyx deposits exist in Yazd and South Khorasan provinces, though production from these areas is intermittent and often sold into the domestic market.
Because onyx veins are narrow and discontinuous, blocks tend to be smaller than marble or travertine blocks — commonly 1 to 4 tons, with occasional larger blocks up to 6 tons. Quarry operators use diamond wire saws and careful blasting techniques to extract onyx without fracturing it, but yield rates are lower than for other stones. Buyers should understand that onyx quarry production is inherently unpredictable: a quarry may produce excellent green onyx for months and then hit a barren zone with little marketable material. This is why lead times for onyx orders are longer and why suppliers often cannot guarantee exact delivery dates for specific colors.
Evaluating Onyx Block Quality and Translucency
Quality assessment for onyx is more nuanced than for marble or travertine because translucency is the defining value attribute. The three main quality criteria are color purity, translucency, and fracture-free integrity. Color purity means the dominant color is consistent across the block face without muddy transitions or excessive foreign mineral inclusions. Translucency is judged by how evenly light passes through the stone when backlit — high-quality onyx glows uniformly, while lower grades show opaque patches or dark streaks. Fractures are the most serious defect because onyx, unlike marble, cannot be easily resin-filled without affecting its translucent appearance.
Buyers should always request two sets of photos from suppliers: standard surface photos under daylight, and backlit photos taken with a light source behind the block or a cut slab. Backlit photos immediately reveal the stone’s translucency profile and expose internal fractures that standard photos hide. For high-value shipments above $20,000, a third-party inspection at the quarry or processing facility is strongly recommended. Inspectors check block dimensions, weigh each block, photograph all sides, and verify that the color matches the approved reference sample. For guidance on verifying supplier authenticity and quarry documentation, see our guide on verifying Iranian stone supplier authenticity and quarry certificates.
FOB Bandar Abbas Pricing for Onyx Blocks
Onyx is priced significantly higher than other Iranian stones because of its rarity and the difficulty of extracting large, fracture-free blocks. FOB Bandar Abbas prices typically range from $500 to $1,200 per ton, with the breakdown roughly as follows: green onyx super grade with strong translucency and deep color commands $800 to $1,200 per ton; honey onyx ranges from $500 to $850 per ton depending on color saturation and banding pattern; white onyx with high purity sells for $600 to $1,000 per ton; and multi-color onyx varies widely from $450 to $900 per ton based on visual complexity and block size.
Pricing is also affected by block geometry. Large, well-shaped blocks above 4 tons that can yield book-matched slab pairs carry a 15–25% premium over smaller, irregular blocks. When requesting a proforma invoice, specify the variety, minimum block weight, acceptable color range, and whether book-matching is required. Because onyx is sold in smaller volumes, some suppliers quote per block rather than per ton — always confirm the pricing unit and total weight to compare quotes accurately.
Specialized Handling and Container Packing
Onyx is significantly more fragile than marble or travertine. Its crystalline structure and natural fractures make it susceptible to cracking under vibration, impact, and uneven loading during the 500 to 800 kilometer truck journey from quarry to Bandar Abbas and the subsequent ocean transit. Suppliers must use proper container packing techniques: blocks should be placed on wooden dunnage with rubber or foam padding at all contact points, braced with timber to prevent shifting, and distributed evenly across the container floor to balance weight.
For mixed loads — onyx combined with marble or travertine in one container — the heavier, denser stones should be loaded first at the front of the container with onyx blocks on top or at the rear, separated by timber partitions. A 20-foot container typically holds 15 to 20 tons of onyx (less than the 25–28 tons of marble due to onyx’s lower density and the need for more bracing). Buyers should insist that the supplier send photos of the loaded container before sealing, showing the bracing arrangement and block positions. For a broader overview of the export logistics chain, see our guide on importing natural stone blocks from Iran step by step.
Order Volumes, Lead Times, and Project Planning
Because onyx quarries produce limited quantities, wholesale buyers must plan orders well in advance. A single quarry might produce only 30 to 80 tons of marketable onyx per month — a fraction of what a travertine quarry produces. For buyers needing specific colors for large projects, the supplier may need to accumulate blocks over several weeks or source from multiple quarries to fulfill the order. Typical lead times are 4 to 8 weeks from order confirmation to vessel loading, compared to 2 to 4 weeks for travertine or marble.
For project timelines, allow 8 to 14 weeks total: 4 to 8 weeks for block accumulation and packing, 2 to 4 weeks for ocean shipping from Bandar Abbas, plus customs clearance. Partial container loads are possible for smaller orders, but LCL (less than container load) shipping increases the risk of damage due to shared container handling. Whenever possible, consolidate onyx into a full container even if it means waiting longer for the supplier to accumulate sufficient blocks. For details on the documents required throughout this process, see our guide on Iranian natural stone export documentation.
How to Source Iranian Onyx Stone Blocks for Wholesale Export
1. Understand Iranian onyx varieties
Iran produces green onyx, honey onyx, white onyx, and multi-color onyx. Each comes from different quarries and commands different price points. Identify which variety your market demands.
2. Identify active onyx quarries
Iranian onyx is quarried primarily in the central provinces. Ask your supplier for quarry names and recent production photos to verify current availability.
3. Evaluate block quality and translucency
Onyx quality is judged by color purity, translucency, and absence of fractures. Request photos with backlighting to assess translucency before purchasing.
4. Request FOB Bandar Abbas pricing
Onyx is a premium stone — FOB prices typically range from $500 to $1,200 per ton depending on variety, color intensity, and block size. Confirm the grade and pricing in a proforma invoice.
5. Arrange specialized handling
Onyx blocks are more fragile than travertine or marble and require careful packing and bracing in containers. Ensure your supplier uses proper dunnage and padding.
6. Plan for smaller order volumes
Onyx quarries produce fewer blocks than travertine or marble quarries. Orders may be smaller (partial containers) and lead times longer. Plan accordingly for project timelines.
Frequently Asked Questions
Where is onyx quarried in Iran?
Iranian onyx is quarried primarily in the central provinces, including Isfahan and Kerman. Green onyx, honey onyx, and white onyx each come from specific quarry areas with distinct geological characteristics.
How much does Iranian onyx cost per ton FOB Bandar Abbas?
Iranian onyx blocks typically range from $500 to $1,200 per ton FOB depending on variety, color intensity, translucency, and block size. Green and multi-color onyx command the highest prices.
Is Iranian onyx suitable for backlighting applications?
Yes. Iranian onyx is prized for its translucency, making it ideal for backlit wall panels, bar tops, and feature walls. Request backlit photos from your supplier to evaluate translucency quality.
What is the minimum order quantity for Iranian onyx blocks?
Onyx quarries produce smaller volumes than travertine or marble. Some suppliers accept partial container loads. For wholesale pricing, a full container (15–20 tons of onyx) is typical.
How do I assess onyx block quality before buying?
Request photos with and without backlighting, check for fractures and color consistency, and ask about the quarry’s typical block yield. A third-party inspection is recommended for high-value onyx shipments.
Can StoneBuySell source specific onyx colors for my project?
Yes. We work with multiple onyx quarries across Iran and can source specific colors and grades. Contact us on WhatsApp with your onyx requirements and we will provide current availability and pricing.
References
- International Trade Centre (ITC) — Trade Map: https://www.trademap.org (natural stone trade statistics by HS code 2515 and 2516)
- UN Comtrade Database — International Trade Statistics: https://comtradeplus.un.org (Iran onyx and ornamental stone export volumes)
- Wikipedia — Incoterms: https://en.wikipedia.org/wiki/Incoterms (FOB, CIF, EXW definitions for international trade)
- Mindat.org — Mineral Database: https://www.mindat.org (geological data on onyx and chalcedony deposits in Iran)