mineral

Quartz-rich crystal cluster (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Pale white to translucent, vitreous-to-pearly luster, commonly hexagonal crystal structure, Mohs hardness 7, no true cleavage, conchoidal fracture, specific gravity about 2.65. The image is somewhat blurred, so individual crystal faces and associated minerals are not certain.

Identified August 20, 2026More mineral →

Explore Quartz-rich crystal cluster (likely milky quartz) 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 when silica-rich hydrothermal fluids cooled in a cavity or fracture, allowing quartz crystals to grow; such specimens range from Precambrian to recent geological ages. Common in veins, geodes, pegmatites, and metamorphic rocks.

Uses & applications

Used for glass, electronics, abrasives, ceramics, and engineered stone; attractive clusters are sold as inexpensive display specimens and occasionally used in jewelry.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric, producing an electrical charge under pressure.

Field identification & locations

Identify by hardness (scratches ordinary glass), lack of cleavage, conchoidal fracture, and white translucent appearance; common worldwide, especially Brazil, Madagascar, Arkansas, and the Alps. A definitive identification would require a clearer image or testing for associated minerals.