mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale, Color: Milky white, clear, gray, or yellowish, Luster: Vitreous to greasy, Crystal structure: Trigonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65
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Physical properties
Hardness: 7 on Mohs scale, Color: Milky white, clear, gray, or yellowish, Luster: Vitreous to greasy, Crystal structure: Trigonal, Cleavage: None (conchoidal fracture), Specific Gravity: 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 veins and pegmatites.
Uses & applications
Used in electronics (oscillators, quartz clocks), glassmaking, abrasives, gemstones, and ornamental objects.
Geological facts
Quartz is one of the most abundant and widespread minerals on Earth's continental crust and exhibits strong piezoelectric properties.
Field identification & locations
Easily identifiable in the field by its high hardness (scratches glass), lack of cleavage, and distinct conchoidal fracture. 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