mineral

Quartz-rich translucent stone, possibly quartzite or milky quartz

Quartz (SiO₂), potentially quartzite if the specimen is metamorphic

AI-generated identification · may be incorrect

Appears translucent gray-white with a vitreous to slightly dull luster and irregular fractured surfaces; quartz has Mohs hardness 7, no cleavage, conchoidal fracture, and specific gravity about 2.65. The image is insufficient to confirm crystal form or distinguish quartz from quartzite.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich fluids or igneous melts; quartzite forms when quartz sandstone recrystallizes during metamorphism. Quartz ranges from Precambrian to modern geological settings and occurs worldwide.

Uses & applications

Used in glass, ceramics, electronics, abrasives, engineered stone, and construction; attractive clear or colored pieces may be cut or collected as specimens.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric. Translucent gray material can also resemble chalcedony, feldspar, or weathered glass, so identification requires testing.

Field identification & locations

Common locations include hydrothermal veins, granites, pegmatites, and metamorphic terrains. A glass-scratch test, lack of cleavage, and hardness near 7 support quartz, but avoid testing valuable specimens.