In modern luxury design and high-end commercial architecture, selecting materials that balance organic character with minimalist elegance is essential. Pietra Grey Marble (geologically a metamorphic rock formed by the recrystallization of limestone under intense geothermal heat and tectonic pressure) is one of the most sought-after natural stones in the global market. Characterized by its deep graphite-grey background and distinctive white quartz veining, this material provides a sophisticated, tactile texture that instantly elevates any facade, lobby, or residential space.
At SherkatStone, we source and distribute premium-grade Pietra Grey Marble directly from the most reputable quarries in Iran, including the famous Lashotor region south of Isfahan. Our selection showcases the finest vein structures, offering architects and builders a clean, linear direction that aligns with modern vertical cladding trends. The stone's neutral color palette makes it highly versatile, complementing concrete, steel, glass, and rich wood finishes in both interior and exterior environments.
The geological formation of Pietra Grey Marble involves slow mineral recrystallization over millions of years. As carbon-dioxide-rich thermal waters rise through limestone beds, they release gas and precipitate layers of calcium carbonate. Trace elements of carbon compounds and organic materials are trapped within these layers, creating the distinct dark grey background with striking white quartz veins. This slow, high-pressure process results in a stone of remarkable durability, capable of withstanding severe environmental stress.
This natural stone is a long-term investment for high-end architectural projects, significantly increasing both the aesthetic and commercial value of the building. Thanks to its stable physical properties, architects can trust that the facades and flooring will retain their original beauty without degrading over generations.
Pietra Grey Marble is uniquely suited for a wide range of heavy-traffic and high-exposure architectural applications due to its natural structural composition. Some of its primary B2B project applications include:
In modern interior design, architects frequently pair Pietra Grey Marble with minimalist elements like raw concrete walls, matte black steel, and brushed bronze hardware. The contrasting textures highlight the organic beauty of the stone's linear veins. Additionally, its Light Reflectance Value (LRV) makes it highly effective for reflecting natural light, reducing the need for artificial lighting in deep floorplans.
B2B buyers frequently face critical challenges when importing natural stone directly from traditional quarries or small-scale processing mills. These challenges include extreme variation in color consistency across batches, dimensional inaccuracies, micro-fractures, and poor packaging that leads to heavy chipping during transit. SherkatStone operates as a dedicated export aggregator and sourcing coordinator, solving these exact pain points through professional supervision.
We maintain direct agreements with multiple quarries and state-of-the-art processing yards in Isfahan and Yazd. Our professional inspectors select raw blocks based on structural soundness and uniform veining. During processing, we enforce strict quality control, including checking that tiles are squared perfectly and thickness tolerances are held within +/-1mm. By supervising the entire supply chain, we consolidate large-volume orders from different processing plants, providing a level of reliability and supply capacity that individual quarries cannot match.
Our quality inspection protocols also include ultrasonic scanning of raw blocks to detect internal fissures before cutting. This ensures that every slab produced has the high mechanical integrity required for heavy-duty structural applications. We also check the moisture levels of the stone before applying resin or fillers, ensuring optimal adhesion and preventing future peeling or discoloration.
Furthermore, as trade coordinators rather than factory operators, we are not limited by the capacity of a single facility. We utilize a broad network of processing plants equipped with top-tier Italian machinery. This setup allows us to fulfill large orders with high efficiency, ensuring consistent quality and strict adherence to project timelines.
For engineering compliance and architectural approval, our Pietra Grey Marble is systematically tested against international ASTM and EN standards:
| Physical Property | Typical Value | Test Method |
|---|---|---|
| Bulk Specific Gravity (Density) | 2.73 g/cm³ | ASTM C97 / EN 1936 |
| Water Absorption (by weight) | 0.18% | ASTM C97 / EN 13755 |
| Compressive Strength (Dry/Wet) | 115 MPa | ASTM C170 / EN 1926 |
| Modulus of Rupture (Flexural Strength) | 11.2 MPa | ASTM C99 / EN 12372 |
| Abrasion Resistance (Wear Index) | 18.2 Ha | ASTM C241 |
The low water absorption value of 0.18% ensures that Pietra Grey Marble is highly resistant to frost damage and staining. This makes it an ideal material for exterior cladding in cold climates and flooring in wet areas.
Whether your project requires raw material for local processing or pre-cut tiles for immediate installation, we offer flexible sizing options:
Additionally, we supply custom elements such as stair treads, risers, skirtings, and architectural moldings. Our partner processing facilities are equipped with multi-axis CNC machines and bridge cutters, allowing us to deliver complex curved shapes and edge profiles based on your specific shop drawings.
The appearance of Pietra Grey Marble is highly influenced by the cutting method and surface finish applied:
Vein Cut slices parallel to the natural bedding planes, creating straight linear lines. Cross Cut slices across the bedding, resulting in a circular, flower-like pattern with a more blended look.
Unfilled marble highlights the natural structural cavities of the stone, giving it a rustic, antique look. Filled marble uses color-matched cementitious or epoxy resin to seal the pores, creating a smooth, flat surface.
We provide a wide range of surface treatments: **Polished** for high light reflection, **Honed** for a soft satin finish, **Brushed (Leathered)** for a rich textured feel, and **Tumbled (Antique)** for weathered edges.
Our Pietra Grey Marble is highly resistant to extreme temperature fluctuations. The stone's natural density and low water absorption allow it to withstand freeze-thaw cycles without fracturing the rock structure. This makes it an ideal facade material for cold regions such as Russia and Central Asia, where winter temperatures regularly fall below sub-zero.
Conversely, in high-temperature regions like the Middle East and Gulf, Pietra Grey Marble retains its structural integrity without thermal expansion or color fading. Unlike artificial composite cladding materials that degrade under continuous UV exposure, natural marble remains stable and maintains its color profile over decades.
Natural stone is heavy but fragile, requiring professional packaging to withstand the shocks of sea transport and terminal handling. At SherkatStone, we pack all materials in heavy-duty, fumigated wooden crates constructed from high-quality timber. Slabs are loaded into sturdy wooden A-frames lined with high-density foam buffers, and secured with steel straps. Tiles are packed into crates with foam protection on all six sides, and strapped to prevent movement inside containers.
Each crate is marked with a detailed packing list and batch identification code, ensuring complete traceability. We also include desiccant bags inside the plastic wrapping to prevent moisture buildup during transit through humid maritime routes.
We manage the entire export process, coordinating shipping from processing yards in Isfahan to the port of Bandar Abbas, and arranging ocean freight to global destinations. We offer flexible trade terms (FOB, CFR, CIF) and provide all necessary documentation—including packing lists, commercial invoices, certificates of origin, and phytosanitary certificates—to ensure smooth customs clearance.
For land transit to neighboring countries such as Iraq, Turkey, and Armenia, we coordinate with certified trucking fleets. Each truck is loaded under the supervision of our logistics team to ensure correct weight distribution, preventing damage during long-distance road transport.
To preserve the beauty and structural integrity of Pietra Grey Marble, proper installation and maintenance are essential. For exterior facades, we recommend using mechanical anchoring systems rather than adhesive mortar, especially for tall structures, to ensure long-term safety. The stone should be sealed with a high-quality, breathable penetrating sealer immediately after installation to protect against water staining and freeze-thaw cracking. Daily cleaning should be performed using neutral pH stone cleaners, avoiding acidic or abrasive agents.
We select raw blocks from the same layer of the quarry and process them together. Our quality control team manually sorts the finished tiles into uniform shade categories before packing.
Lead times vary based on order volume and required finishes. Standard tile orders (approx. 2-3 containers) are typically processed and loaded within 15 to 25 business days.
Yes. When processed with a honed or brushed finish and filled with high-strength epoxy resin, Pietra Grey Marble offers excellent durability and slip resistance for commercial public spaces.
Yes. We provide sample sets containing representative color ranges and finishes, shipped via international courier to support the design approval process.
Our standard terms are a 30% advance deposit via currency exchange networks, with the remaining balance settled upon presentation of draft shipping documents.
Absolutely. The stone is natural and inert. With a suitable sealer applied, it withstands high humidity and salt spray without surface degradation.
Yes. We welcome and facilitate inspections by international agencies such as SGS or Bureau Veritas at our loading yards before shipment.
Yes, B2B buyers can consolidate multiple stone types, dimensions, and finishes within a single shipment to optimize logistics costs.
We provide the Commercial Invoice, Packing List, Certificate of Origin, Phytosanitary Certificate (for wood crates), and Laboratory Test Reports.
We coordinate multimodal transport, combining sea shipping to ports with rail or truck transport to landlocked CIS destinations.
Partner with SherkatStone for transparent sourcing, professional quality inspection, and reliable international shipping. Contact our export desk today to request pricing, catalog sheets, or samples for your upcoming project.
| Dimensions | Slabs / Custom Tiles |
| Density / Weight | 2.7 g/cm³ |
| Stone Type | Marble |
| Color & Pattern | Black / Dark Grey |
| Finish Type | Polished Finish |
| Compressive Strength | Extremely High |
| Water Absorption | Cross Cut (CC) |
| Porosity | No |
| Grade | No |
| Custom cutting | Yes |
