mineral

Clear Quartz (Druzy)

Crystalline Silicon Dioxide (SiO2)

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

Hardness: 7 (Mohs scale)
Color: Colorless to white
Luster: Vitreous/Glassy

Identified March 2, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed by the precipitation of silica from hydrothermal solutions in voids or cavities within igneous or sedimentary rocks. Druzy specifically forms when tiny crystals grow over a host stone or mineral matrix.

Uses & applications

Industrial use in glassmaking and electronics (piezoelectricity); widely used in jewelry as beads or pendants; highly valued in spiritual and decorative collecting.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. The term 'druzy' refers to the glittering effect of tiny crystals coating a rock surface, resembling sparkling sugar.

Field identification & locations

Identify by its 7 hardness (it will scratch glass) and lack of cleavage. Commonly found in geodes, vugs, and hydrothermal veins. Major sources include Brazil, Madagascar, and the USA.

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