mineral

Quartz Druze

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Clear to milky white; Luster: Vitreous (glassy); Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Hardness: 7 on Mohs scale
Color: Clear to milky white
Luster: Vitreous (glassy)

Identified March 15, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Clear to milky white; Luster: Vitreous (glassy); Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Formation & geological history

Formed through hydrothermal processes where silica-rich fluids precipitate into cavities in host rocks, such as geodes or vugs, over thousands to millions of years across various geological ages.

Uses & applications

Predominantly used for ornamental purposes, lapidary art, jewelry (pendants and rings), crystal healing/metaphysical collecting, and as decorative mineral specimens.

Geological facts

The term 'druzy' refers to a coating of fine crystals on a rock surface. Quartz is the most common mineral to form druzy coatings because of its abundance in the Earth's crust.

Field identification & locations

Identify in the field by its characteristic 'shimmer' or 'glitter' caused by many tiny crystal facets reflecting light. Commonly found in Brazil, Uruguay, and the United States (notably Missouri and Arkansas). Hardness test can distinguish it from softer minerals like calcite.