mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale, Color: White, clear, or milky, Luster: Vitreous to greasy, Crystal structure: Trigonal, Cleavage: None, Specific Gravity: 2.65
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Physical properties
Hardness: 7 on Mohs scale, Color: White, clear, or milky, Luster: Vitreous to greasy, Crystal structure: Trigonal, Cleavage: None, Specific Gravity: 2.65
Formation & geological history
Formed in a wide range of environments including igneous, metamorphic, and sedimentary rocks, often crystallizing from silica-rich hydrothermal solutions or magmas.
Uses & applications
Used in glassmaking, electronics, oscillators, abrasives, and gemstone carving.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electric charge in response to applied mechanical stress.
Field identification & locations
Can be identified by its characteristic conchoidal fracture, high hardness (scratches glass), and lack of cleavage. Found worldwide.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary