mineral

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Hardness: 7 on Mohs scale; Color: Milky white to translucent; Luster: Vitreous/waxy when polished; Crystal Structure: Hexagonal/Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Milky white to translucent
Luster: Vitreous/waxy when polished

Identified May 7, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Milky white to translucent; Luster: Vitreous/waxy when polished; Crystal Structure: Hexagonal/Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Formed through the crystallization of magma or from hydrothermal veins. The milky appearance is caused by tiny fluid inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used frequently in jewelry as beads or carvings (like this 'mushroom' shape), in glassmaking, as an abrasive, and in the production of quartz watches and electronics.

Geological facts

Milky quartz is the most common variety of crystalline quartz. While often considered less valuable than clear crystal, it represents the largest volume of quartz found in the Earth's crust.

Field identification & locations

Identified by its white color and ability to scratch glass (Hardness 7). This specimen has been carved and polished into a decorative shape. Common worldwide in granitic rocks and ore veins.