mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Cloudy white to pale translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Cloudy white to pale translucent
Luster: Vitreous to greasy

Identified May 12, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Cloudy white to pale translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed during the final stages of hydrothermal or magmatic crystallization. The milky appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth. Can be found in veins or as part of igneous rocks like granite.

Uses & applications

Used in the manufacturing of glass, ceramics, and sandpaper; also used in landscaping, as a gemstone in costume jewelry, and widely collected as a chakra or healing stone.

Geological facts

Milky Quartz is the most common variety of crystalline quartz. While most fossils represent bone or shell, some are perfectly replaced by quartz in a process called silica replacement.

Field identification & locations

Identify in the field by its hardness (will scratch glass), lacks cleavage, and characteristic waxy-to-vitreous luster. Commonly found in mountainous regions or as pebbles in riverbeds.