mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale; Color: Milky white to tan/yellow due to weathering; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Milky white to tan/yellow due to weathering
Luster: Vitreous to greasy

Identified May 18, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal fluids in veins or as a primary mineral in igneous rocks like granite. Often found in gold-bearing veins.

Uses & applications

Used in glassmaking, ceramics, as an abrasive, and in the production of silicon for electronics. Also popular for decorative landscaping and as beginner collector specimens.

Geological facts

Milky quartz gets its cloudy appearance from minute fluid inclusions of gas or liquid trapped during the crystal's growth. It is one of the most common minerals on Earth's crust.

Field identification & locations

Identify by its hardness (it will scratch glass), lack of cleavage, and white streak. Frequently found in riverbeds, mountain outcroppings, and mining tailings.