mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale. Color: White to translucent creamy yellow. Luster: Vitreous to greasy. Crystal structure: Trigonal/Hexagonal. Cleavage: Indistinct/Conchoidal fracture. Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Color: White to translucent creamy yellow
Luster: Vitreous to greasy

Identified July 20, 2026More mineral →

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Physical properties

Formation & geological history

Forms in hydrothermal veins, pegmatites, and as a primary mineral in igneous rocks like granite. The milky appearance is caused by tiny fluid inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in the production of glass, ceramics, and abrasives. Also common in landscaping, as a gemstone in jewelry (cabochons), and as spiritual or decorative specimens.

Geological facts

Milky quartz is one of the most common varieties of crystalline quartz on Earth. The 'milkiness' comes from microscopic bubbles that distribute the light throughout the stone.

Field identification & locations

Identify by its hardness (will scratch glass), white streak, and lack of cleavage. It is found globally in riverbeds, mountains, and desert wash environments.