mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: White to translucent cloudy white; Luster: Vitreous/waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 (Mohs scale)
Color: White to translucent cloudy white
Luster: Vitreous/waxy

Identified February 10, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: White to translucent cloudy white; Luster: Vitreous/waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed through hydrothermal processes, typically as fluid-filled veins in igneous and metamorphic rocks. It can also form in pegmatites. The white color is caused by tiny fluid inclusions of gas and/or liquid trapped during crystal growth.

Uses & applications

Used in construction as aggregate, for glass manufacturing, as an abrasive, and in jewelry/beads. It is also highly valued by collectors for decorative purposes or as a 'healing crystal' in metaphysical circles.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of quartz. Many gold deposits around the world were discovered specifically by tracking milky quartz 'mother lode' veins.

Field identification & locations

Identify in the field by its hardness (it can scratch glass and steel), lack of cleavage, and characteristic waxy or milky appearance. Often found as water-worn pebbles in riverbeds or as jagged outcroppings in mountain regions.