Starry Purple Porphyry features a light silvery earth grey base with subtle purple undertones. The stone presents scattered darker spots and fine veins, creating a natural, dynamic pattern that resembles starlight on a dusky sky. The texture is compact with a fine to medium grain, and occasional larger crystal inclusions typical of porphyry.

Texture & Pattern

• Texture:  Fine to medium-grained crystalline porphyritic structure
• Pattern: Irregular darker spots, delicate veins, soft flow lines
• Surface feel: Naturally non-slip when flamed or bush hammered

Physical and Mechanical Properties

(typical for Chinese porphyry; actual test reports recommended for exact block)

• Density: ~2.85 g/cm³
• Water absorption: ~0.30%
• Porosity: Low
• Compressive strength: 160–180 MPa
• Flexural strength: 12–15 MPa
• Mohs hardness: 6–7 (good resistance to scratching)
• Slip resistance: Very good when flamed or bush hammered

Chemical Composition (% by weight)

(approximate for porphyry of this type)

• SiO₂ (Silicon Dioxide): 68–72%
• Al₂O₃ (Aluminum Oxide): 14–17%
• Fe₂O₃ (Iron Oxide): 3–5%
• CaO (Calcium Oxide): 1–2%
• MgO (Magnesium Oxide): 1–2%
• K₂O + Na₂O (Alkali oxides): 4–6%

Mineral Composition (% by weight)

• Quartz: ~30–35%
• Feldspar (plagioclase, microcline): ~40–45%
• Mica and hornblende: ~5–10%
• Other (accessory minerals + iron oxides): ~10%

Common Uses

• Exterior paving (squares, streets, plazas)
• Wall cladding (façades)
• Stair treads and risers
• Pool surrounds
• Interior floors in high-traffic areas
• Landscaping and garden features

Maintenance

• Easy maintenance — periodic cleaning with neutral detergent
• Low porosity reduces risk of staining
• Re-sealing recommended for polished surfaces in interior applications
• Resistant to frost, heat, and weathering

Standard Cutting Sizes (cm)

Tiles: 30×60, 40×40, 60×60, 60×90, 60×120

Slabs: 120×240 up to 150×300 (depending on quarry block size)

Thickness: 2 cm, 3 cm standard; custom thickness on request

Surface Finish Options

• Flamed
• Bush hammered
• Sandblasted
• Honed
• Polished (less common due to porphyry texture)
• Natural split