mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white or colorless, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65
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Physical properties
Hardness of 7 on the Mohs scale, typically white or colorless, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65
Formation & geological history
Forms in a wide variety of geological environments including igneous, metamorphic, and sedimentary rocks, often crystallizing from silica-rich hydrothermal solutions or magmas
Uses & applications
Used in electronics, oscillators, glassmaking, abrasives, and as a semi-precious gemstone in jewelry
Geological facts
Quartz is one of the most abundant and widely distributed minerals found on Earth's continental crust, and exhibits piezoelectric properties
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and conchoidal fracture; found worldwide in virtually all geological settings
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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