mineral
Quartz Mineral
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 (Mohs scale), Color: Colorless to milky white, Luster: Vitreous (glassy), Crystal structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Colorless to milky white, Luster: Vitreous (glassy), Crystal structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific gravity: 2.65
Formation & geological history
Formed through the crystallization of silica-rich magma or precipitation from hydrothermal veins. It is found in all types of rocks and across all geological eras.
Uses & applications
Used in glassmaking, electronics (piezoelectric properties), abrasives, construction sand, and as a gemstone in jewelry.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. It is highly resistant to both chemical and physical weathering, which is why it dominates beach sand.
Field identification & locations
Identify by its hardness (scratches glass), lack of cleavage, and glassy appearance. Commonly found worldwide in mountain ranges, riverbeds, and beach deposits.
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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