mineral
Quartz (Common Quartz/Quartzite)
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Grayish-white, tan, or translucent; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Grayish-white, tan, or translucent
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale; Color: Grayish-white, tan, or translucent; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
Formation & geological history
Formed from the crystallization of silica-rich magma or through hydrothermal processes. It can also form through the metamorphism of sandstone into quartzite.
Uses & applications
Used in glassmaking, electronics (piezoelectric properties), abrasives, construction aggregates, and as a semi-precious gemstone in jewelry.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. It is extremely resistant to chemical and physical weathering, which is why it is often the primary component of river and beach sand.
Field identification & locations
Identify in the field by its ability to scratch glass and its lack of cleavage. It often appears as rounded river pebbles or jagged crystalline masses in veins.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous