mineral

Druzy Quartz (part of a Geode)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Colorless to white/yellowish (due to iron staining); Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Colorless to white/yellowish (due to iron staining)
Luster: Vitreous (glassy)

Identified March 11, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Colorless to white/yellowish (due to iron staining); Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.65.

Formation & geological history

Formed through hydrothermal processes where silica-rich fluids precipitate into cavities or pockets in igneous or sedimentary rock. This specimen appears to be a fragment of a geode or a quartz vein crust.

Uses & applications

Used primarily in jewelry making (especially in pendant form), as decorative metaphysical specimens, and in the production of glass and electronic components in its pure industrial form.

Geological facts

The word 'druzy' refers to a coating of fine crystals on a rock fracture or surface. Quartz is the second most abundant mineral in Earth's continental crust. Famous geode sources include Brazil, Uruguay, and the 'Geode State Park' in Iowa.

Field identification & locations

Identify in the field by its distinct 'sugar-like' sparkling surface and its ability to scratch glass. Commonly found in areas with volcanic activity or sedimentary basin limestone. Collectors should look for undamaged terminations and consistency in crystal size.

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