mineral

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Mohs hardness: 7. Color: Colorless/Transparent. Luster: Vitreous. Crystal structure: Trigonal/Hexagonal. Specific gravity: 2.65. Cleavage: None (conchoidal fracture).

Hardness: 7
Color: Colorless/Transparent
Luster: Vitreous

Identified July 7, 2026More mineral →

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Physical properties

Mohs hardness: 7. Color: Colorless/Transparent. Luster: Vitreous. Crystal structure: Trigonal/Hexagonal. Specific gravity: 2.65. Cleavage: None (conchoidal fracture).

Formation & geological history

Forms through the cooling of silica-rich magma or in hydrothermal veins and geothermal waters. It is found in igneous, metamorphic, and sedimentary environments worldwide across geological ages.

Uses & applications

Extensively used in jewelry (as a gemstone), crystal healing, precision electronics (piezoelectric properties), and glass manufacturing.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Clear quartz is often called 'Rock Crystal.' Ancient Greeks believed it was ice that had hardened so much it would never melt.

Field identification & locations

Identify by its hardness (scratches glass), clarity, and lack of cleavage. Tumbled specimens are smooth and rounded through mechanical polishing. Found globally, with major deposits in Brazil and Arkansas.