mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

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

Identified May 25, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed during the final stages of hydrothermal or magmatic crystallization, often in veins where water and high-pressure fluids transport silica. Can be found in various geological ages worldwide.

Uses & applications

Used in glassmaking, as an abrasive, in electronics for its piezoelectric properties, in landscaping, and as a collector's specimen.

Geological facts

The milky white color is caused by millions of tiny microscopic gas or water bubbles trapped during the crystal's formation. It is one of the most common minerals on Earth's crust.

Field identification & locations

Identify by its white, cloudy appearance and ability to scratch glass. It is often found in riverbeds, quartz veins in igneous and metamorphic rocks, and as large chunks in open fields.