mineral

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

White to translucent, vitreous-to-waxy luster, irregular fracture, and no visible cleavage; Mohs hardness 7, though the rough surface obscures crystal form. Specific gravity is about 2.65 and crystals are trigonal.

Identified August 17, 2026More mineral →

Explore Milky quartz (likely) 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

Forms when silica-rich fluids crystallize in veins, cavities, and pegmatites, commonly in igneous and metamorphic rocks; specimens may range from ancient Precambrian to recent hydrothermal deposits.

Uses & applications

Used for glass, ceramics, abrasives, engineered stone, and electronics; attractive pieces are sold as inexpensive mineral specimens. This irregular fragment has little jewelry value without cutting or polishing.

Geological facts

Its cloudy appearance results from microscopic fluid inclusions, fractures, or impurities. Quartz is one of Earth’s most abundant minerals and is resistant to weathering.

Field identification & locations

Common worldwide, including Brazil, Madagascar, the United States, and many quartz-vein localities. Identify by hardness— it should scratch ordinary glass—and by its lack of cleavage; confirm cautiously because calcite or glass can look similar.