mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: White to creamy; Luster: Vitreous to greasy; Crystal Structure: Trigonal (often massive in pebbles); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

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

Identified June 13, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: White to creamy; Luster: Vitreous to greasy; Crystal Structure: Trigonal (often massive in pebbles); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed in hydrothermal veins or pegmatites where silica-rich fluids cool. Milky appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth. Can be found in geological formations of almost any age.

Uses & applications

Used in glass making, ceramics, as an abrasive, in electronics (though usually higher purity), and extensively in landscaping and decorative gravel.

Geological facts

Quartz is the most abundant mineral in the Earth's continental crust. Pure quartz is clear, but Milky Quartz is white due to millions of fluid inclusions that scatter light.

Field identification & locations

Identified by its white color, ability to scratch glass (hardness 7), and lack of cleavage. Commonly found in riverbeds, mountains, and as garden stones. Collectors should look for distinct crystalline faces or gold-bearing potential in quartz veins.