Rock Identifier

mineral

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale. Color: Translucent grayish-white with sparkling surface facets. Luster: Vitreous to greasy. Crystal structure: Hexagonal/trigonal. Cleavage: None (conchoidal fracture). Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Translucent grayish-white with sparkling surface facets
Luster: Vitreous to greasy

Identified July 26, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale. Color: Translucent grayish-white with sparkling surface facets. Luster: Vitreous to greasy. Crystal structure: Hexagonal/trigonal. Cleavage: None (conchoidal fracture). Specific gravity: 2.65.

Formation & geological history

Formed through crystallisation from hydrothermal fluids or cooling igneous magmas in various geological environments, including pegmatites and quartz veins.

Uses & applications

Used in mineral collections, educational kits, jewelry, and industrial applications such as glassmaking, electronics, and abrasives.

Geological facts

Quartz is the second most abundant mineral in the Earth's continental crust after feldspar, and its name originates from the German word 'Quarz'.

Field identification & locations

Identified by its ability to scratch glass (hardness 7) and lack of cleavage. Common in riverbeds, gravel deposits, and mountainous veins worldwide.

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