mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: white to translucent/gray; Luster: vitreous (glassy) to waxy; Crystal structure: Hexagonal; Cleavage: none (conchoidal fracture); SG: 2.65
- Hardness
- 7 on Mohs scale
- Color
- white to translucent/gray
- Luster
- vitreous (glassy) to waxy
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Physical properties
Hardness: 7 on Mohs scale; Color: white to translucent/gray; Luster: vitreous (glassy) to waxy; Crystal structure: Hexagonal; Cleavage: none (conchoidal fracture); SG: 2.65
Formation & geological history
Forms in igneous, metamorphic, and sedimentary environments; commonly found in hydrothermal veins and pegmatites. This specimen likely weathered out of a vein and was tumbled by water.
Uses & applications
Used in glassmaking, electronics (piezoelectric properties), abrasives, and as a semi-precious gemstone in jewelry.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'quarz', which has Slavic origins.
Field identification & locations
Identify by its ability to scratch glass and lack of cleavage. Look for it in riverbeds, beaches, and mountain trails worldwide.
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Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
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Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
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Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
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Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
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Granite
Granite (Phaneritic intrusive igneous rock)
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