Milky Quartz

Physical Properties

Hardness: 7 on the Mohs scale. Color: White to translucent cream. Luster: Vitreous to greasy. Crystal structure: Trigonal/Hexagonal. Cleavage: Poor/None (conchoidal fracture). Specific Gravity: 2.65.

Formation & Geological History

Forms in a wide variety of environments, most commonly from the cooling of magma or by hydrothermal precipitation in veins. Its white color is caused by tiny fluid inclusions of gas or liquid trapped during crystal growth.

Uses & Applications

Used in the manufacturing of glass, abrasives, and electronics (due to piezoelectric properties). Often used as decorative gravel, in landscaping, or as tumbled stones for metaphysical purposes.

Geological Facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky Quartz specifically is the most common variety of quartz found in nature. Historic specimens have been used in stone tools since prehistoric times.

Field Identification & Locations

Identify in the field by its ability to scratch glass, its lack of cleavage (it breaks in irregular, curved shards), and its typical white, cloudy appearance. It is ubiquitous in riverbeds and mountainous terrain.

Identified on: 4/25/2026

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