mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Opaque white; Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

Hardness: 7 on Mohs scale
Color: Opaque white
Luster: Vitreous to greasy

Identified June 8, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Opaque white; Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

Formation & geological history

Formed from the cooling and solidification of silica-rich hydrothermal fluids or magma, often in vein deposits. The white color is caused by tiny inclusions of liquid, gas, or both, trapped during crystal growth.

Uses & applications

Used as an abrasive, in glass making, electronics (piezoelectric properties), and widely as tumbled stones for landscaping, decor, or jewelry.

Geological facts

Milky Quartz is one of the most common minerals found on Earth's crust. It is essentially clear quartz that has been 'poisoned' with millions of microscopic bubbles.

Field identification & locations

Identify by its inability to be scratched by steel, its white waxy appearance, and lack of flat cleavage planes. Found globally in almost all geological environments.