Petersburg Grey Stone Marble Slabs

Petersburg Grey Marble is one of Russia's most distinguished export marbles — a dense, fine-grained metamorphic stone quarried from the ancient, mineral-rich geological formations of the Ural region. Its hallmark is a sophisticated, cool silver-grey base delicately crossed by soft white calcite veining and subtle charcoal undertones, evoking the regal elegance and timeless architectural heritage of its namesake city. Formed under extensive geological heat and pressure, Petersburg Grey Marble is classified among the most durable and refined light-grey marbles commercially available, offering impressive structural cohesion and low porosity. Its exceptional polish retention, neutral aesthetic versatility, and consistent tonal depth make it the marble of choice for contemporary luxury interiors, high-traffic commercial foyers, premium bathroom vanities, and modern architectural cladding worldwide.

General Specifications

• Category: Marble Natural Stone
• Color: Cool silver-grey to mid-grey base accented with soft white calcite veins and subtle charcoal linear patterns; highly balanced tone
• Surface Finish Available: Polished / Honed / Leathered / Brushed / Rough Block
• Block Form: Raw Quarry Block / Gangsaw Block
• Texture: Fine-grained, micro-crystalline; achieves a sleek mirror gloss; crisp and stable raw block structure
• Density: 2.68 – 2.74 g/cm³ (High density for marble; outstanding material compactivity)
• Water Absorption: < 0.20% (Very low porosity — highly effective against moisture and staining in indoor applications)
• Compressive Strength: 120 – 150 MPa (Exceptional load-bearing strength — highly suited for heavy-traffic interior flooring)
• Abrasion Resistance: Medium-High — demonstrates excellent wear resistance for high-end residential and commercial spaces

Processing & Machinery Assessment

GANGSAW & MULTI-WIRE SAW SUITABILITY

This block has been assessed as fully compatible with both conventional marble gangsaw and modern multi-wire saw processing machinery. Standard block dimensions of L-290 cm × B-170 cm × H-150 cm fall perfectly within the ideal processing window. Petersburg Grey Marble’s highly uniform crystalline composition, lack of micro-fissures, and clean vein structure ensure smooth sawing, minimal edge chipping, and maximum slab recovery rates during high-volume processing.

• Recommended Processing: Gangsaw or wire-saw slabs (1.8 cm & 2 cm), followed by surface resin reinforcement, calibration, and high-precision polishing or honing
• Expected Slab Yield: Approximately 80–90 slabs per block (based on 1.8 cm slab thickness)
• Finish/Polish Result: Luminous, satin-to-mirror polished surface that brings out a deep, velvety modern grey hue with crisp vein contrast