mineral

Likely raw quartz-bearing stone, possibly greenish quartz or calcite

Uncertain from photograph; possible quartz (SiO₂) or calcite (CaCO₃)

AI-generated identification · may be incorrect

Pale gray-green, translucent, rough granular surface with vitreous to dull luster. Quartz hardness is 7 with no cleavage; calcite hardness is 3 and shows prominent rhombohedral cleavage; specific gravity is about 2.65–2.71.

Identified September 14, 2026More mineral →

Explore Likely raw quartz-bearing stone, possibly greenish quartz or calcite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Likely formed in a hydrothermal vein or metamorphic rock, where mineral-rich fluids deposited crystals in fractures; exact age and setting cannot be determined visually.

Uses & applications

Common quartz is used in glass, ceramics, electronics, and construction aggregate; calcite is used for cement, lime, and stone. Ordinary fragments generally have little commercial or jewelry value.

Geological facts

The specimen appears to contain multiple translucent grains and possible iron- or clay-stained areas, but the image is insufficient for reliable species identification.

Field identification & locations

Test hardness against a steel knife or glass, inspect cleavage, and apply dilute vinegar: calcite may fizz, whereas quartz will not. Common sources include hydrothermal veins and metamorphic terrains worldwide.