mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically white to translucent, with a vitreous-to-waxy luster and conchoidal fracture; Mohs hardness 7, no cleavage, hexagonal crystal structure, and specific gravity about 2.65. The orange-brown areas likely reflect iron-oxide staining or surface alteration.

Identified August 8, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in veins, cavities, and fractures, commonly in igneous and metamorphic rocks. Quartz is widespread across geologic ages; this specimen is likely a weathered vein fragment.

Uses & applications

Used in glass, ceramics, engineered stone, abrasives, electronics, and construction aggregate; attractive pieces are sold as inexpensive display specimens.

Geological facts

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

Field identification & locations

Identify it by its glassy appearance, hardness sufficient to scratch ordinary glass, lack of cleavage, and irregular conchoidal fracture. Common worldwide, especially in quartz veins and granitic or metamorphic terrains.