mineral

Quartz (specifically Milky or Clear Chunk)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Colorless to white/cloudy; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Colorless to white/cloudy
Luster: Vitreous (glassy)

Identified March 21, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Colorless to white/cloudy; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed through the cooling of silica-rich magma or from hydrothermal veins. It is found in all types of geological environments and can date back billions of years or be relatively young depending on the host rock formation.

Uses & applications

Used extensively in glass making, electronics (piezoelectric properties), abrasives, and as a raw material for silicon. In specimen form, it is popular for jewelry, 'healing' crystals, and lapidary work.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is chemically very stable and resistant to weathering, which is why it is the primary component of most beach sands.

Field identification & locations

Identify in the field by its ability to scratch glass, its lack of cleavage (it breaks in curved 'shell-like' patterns), and its glassy appearance. Commonly found in riverbeds, mountains, and mining tailings globally.

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Sandstone (with potential mineral staining/concretions)

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Mineral/Rock

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