mineral

Likely quartz-rich stone, possibly milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

White to pale greenish, translucent to opaque, with a vitreous-to-waxy luster and irregular fracture; quartz has Mohs hardness 7, no cleavage, hexagonal crystal structure, and specific gravity about 2.65. The granular, rough appearance could also indicate a quartz-rich metamorphic rock such as quartzite.

Identified August 31, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich hydrothermal fluids or igneous melts; quartzite forms when sandstone is metamorphosed. Exact age and origin cannot be determined from the photograph alone.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and construction aggregate; attractive pieces are sold as inexpensive mineral specimens.

Geological facts

Quartz is one of Earth’s most abundant minerals and is highly resistant to weathering, making it common in stream gravels and many sedimentary rocks.

Field identification & locations

Likely identification is supported by pale color and apparent hardness, but a streak test, glass-scratch test, acid test, and close inspection for mica or feldspar would help distinguish quartz from calcite, feldspar, or quartzite. Common worldwide, especially in granitic and metamorphic terrains.