mineral

Quartz cluster

Quartz (silicon dioxide, SiO₂), likely milky quartz

AI-generated identification · may be incorrect

White to translucent, vitreous-to-pearly luster, irregular intergrown crystals, and no obvious cleavage; Mohs hardness 7, trigonal crystal system, specific gravity about 2.65.

Identified September 16, 2026More mineral →

Explore Quartz cluster in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

White to translucent, vitreous-to-pearly luster, irregular intergrown crystals, and no obvious cleavage; Mohs hardness 7, trigonal crystal system, specific gravity about 2.65.

Formation & geological history

Forms when silica-rich fluids cool in cavities, veins, or fractures, commonly in igneous and metamorphic rocks. The specimen’s exact geological age and locality cannot be determined from the image.

Uses & applications

Used for ornamental specimens, lapidary work, glass, ceramics, electronics, and industrial abrasives; this small cluster has modest decorative and collecting value.

Geological facts

Milky appearance results from microscopic fluid inclusions, fractures, or impurities that scatter light. Quartz is one of Earth’s most abundant and chemically durable minerals.

Field identification & locations

Identify it by its glassy luster, hardness sufficient to scratch ordinary glass, lack of cleavage, and six-sided prismatic crystal habit when developed. Common sources include Brazil, Madagascar, the United States, and China.