mineral

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale. Color: Colorless and transparent. Luster: Vitreous (glass-like). Crystal structure: Trigonal/Hexagonal. Cleavage: Indistinct/None. Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Colorless and transparent
Luster: Vitreous (glass-like)

Identified March 21, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale. Color: Colorless and transparent. Luster: Vitreous (glass-like). Crystal structure: Trigonal/Hexagonal. Cleavage: Indistinct/None. Specific gravity: 2.65.

Formation & geological history

Formed through the crystallization of magma or from hydrothermal veins. Quartz is extremely common and found in all types of geological environments and ages, often as a primary mineral in granite or as a secondary mineral in veins.

Uses & applications

Used extensively in jewelry (as gemstones or beads), industrial glass making, electronics (piezoelectric oscillators in watches), and as a popular specimen for gemstone collectors.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Historically, it was used by ancient civilizations to carve hardstone intaglios and even believed to be 'eternal ice' by ancient Greeks.

Field identification & locations

Identify in the field by its hardness (it will scratch glass), lack of cleavage, and transparent appearance. Commonly found globally, notably in Brazil and Arkansas, USA. As a tumbled stone, identify by its weight and cold feel compared to plastic imitations.