mineral

Quartz (Grain)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Tan to translucent white; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); SG: 2.65

Hardness: 7 on Mohs scale
Color: Tan to translucent white
Luster: Vitreous to waxy

Identified June 2, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Tan to translucent white; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); SG: 2.65

Formation & geological history

Formed in almost all geological environments including igneous intrusions, metamorphic heat/pressure, and sedimentary deposition. This specific grain is likely a weathered clast from a larger source rock.

Uses & applications

Used in manufacturing glass, electronics, abrasives, and as a primary component in building materials like concrete and mortar. Larger crystals are used in jewelry.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is chemically very stable, which is why it remains as sand or small grains after other minerals have weathered away.

Field identification & locations

Identified by its hardness (scratches glass) and lack of cleavage. Commonly found in riverbeds, beaches, and soil. To identify, check for its resistance to weathering and vitreous luster when freshly broken.