Uige Grey Marble

Origin: Uíge Province, Angola

Type: High-quality calcitic marble

Color and Pattern

Uíge Grey Marble is distinguished by its refined grey tones that range from soft pearly hues to deeper graphite shades. Delicate white veins flow naturally across the surface, creating a dynamic yet tranquil aesthetic. This subtle combination of tones makes it highly versatile for modern and classic designs alike.

Texture and Pattern

• Texture: Fine to medium-grained, smooth, and elegant surface.
• Pattern: Soft, flowing veining with occasional cloud-like shades, enhancing depth and visual richness.

Physical & Mechanical Test Results

• Apparent Density: 2,700 kg/m³
• Open Porosity: 0.4 – 0.9%
• Water Absorption: < 0.45%
• Compressive Strength: 95 – 120 MPa
• Flexural Strength: 12 – 16 MPa
• Abrasion Resistance: High – suitable for heavy traffic areas
• Thermal Expansion: 6.0 × 10⁻⁶ °C⁻¹
• Acid Reaction: Moderately sensitive (due to calcite composition)
• Hardness (Mohs): 3 – 4

Chemical Composition

(% by weight, typical for grey marbles)

• CaCO₃ (Calcium Carbonate): 94 – 97%
• SiO₂ (Silica): 1 – 2%
• MgCO₃ (Magnesium Carbonate): 0.5 – 2%
• Fe₂O₃ + Al₂O₃ (Iron & Alumina): 0.3 – 1%
• Other trace minerals: < 0.5%

Mineral Composition (% by weight)

• Calcite: 92 – 96%
• Quartz: 1 – 3%
• Mica / Feldspar: 1 – 2%
• Accessory minerals: < 1%

Applications

• Residential: Countertops, vanity tops, flooring, staircases, wall cladding, fireplace surrounds.
• Commercial: Lobby flooring, wall panels, reception desks, conference tables, and high-traffic spaces.
• Decorative: Sculptures, accent walls, decorative tiles, and bespoke furniture elements.

Maintenance

Clean with pH-neutral stone cleaners. Avoid acidic or abrasive substances to prevent etching. Recommended sealing every 1–2 years for stain resistance. Regular dusting and damp mopping preserve its elegance.

Cutting Sizes (Typical Availability)

• Slabs: 250–320 cm x 140–200 cm
• Tiles: 30 × 30 cm, 60 × 30 cm, 60 × 60 cm, 90 × 60 cm (custom sizes available)
• Thickness: 2 cm and 3 cm (custom up to 5 cm on request)
• Inches: Commonly 12"×12", 18"×18", 24"×24", 36"×24"

Surface Finish Options

• Polished: High-gloss finish, enhancing the stone’s natural colors.
• Honed: Smooth, matte finish for a modern, subtle look.
• Satin / Brushed: Soft texture, understated elegance.
• Sandblasted / Bush-hammered: Anti-slip, ideal for outdoor use.
• Tumbled: Antique, weathered appearance.