mineral
Quartz
SiO2 (Silicon Dioxide)
AI-generated identification · may be incorrectHardness: 7 (Mohs scale), Color: Clear to white, Luster: Vitreous, Crystal structure: Hexagonal, Cleavage: None (conchoidal fracture), Specific gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Clear to white, Luster: Vitreous, Crystal structure: Hexagonal, Cleavage: None (conchoidal fracture), Specific gravity: 2.65
Formation & geological history
Forms from cooling magma or precipitation from hydrothermal solutions; ubiquitous in many geological environments of various ages.
Uses & applications
Used in electronics, glassmaking, construction, jewelry, and widely collected.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Its piezoelectric properties make it essential in watches and electronics.
Field identification & locations
Identify by its hardness (scratches glass), conchoidal fracture, and vitreous luster. Found worldwide in nearly all rock types.
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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