mineral

Quartz Druzy (on Geode Fragments)

Silicon Dioxide (SiO2)

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

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

Identified June 27, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through the precipitation of silica-rich hydrothermal fluids in cavities or pockets of igneous or sedimentary rocks. These specifically appear to be fragments from a geode or vug.

Uses & applications

Used primarily in decorative jewelry, lapidary arts, metaphysical collecting, and as ornamental display pieces.

Geological facts

The term 'druzy' refers to a coating of fine crystals on a rock fracture or within a geode. Quartz is the most common mineral to form druzy, creating a 'sugar-coated' appearance that sparkles in light.

Field identification & locations

Identify by the high hardness (it will scratch glass) and the tiny, interconnected sparkling crystal faces. Commonly found in volcanic regions or limestone deposits (like the Keokuk geodes in the USA).

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Arenite (SiO2 based)

sedimentary

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Mineral/Rock

Banded Gneiss (River Rock/Pebble)

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Metamorphic Rock

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mineral