mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale. Color is typically white, colorless, or various shades depending on impurities. Luster is vitreous (glassy). Crystal system is trigonal. Conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 7 on the Mohs scale. Color is typically white, colorless, or various shades depending on impurities. Luster is vitreous (glassy). Crystal system is trigonal. Conchoidal fracture with no true cleavage.
Formation & geological history
Forms in a wide variety of geological environments, including igneous, metamorphic, and sedimentary rocks. Often crystallizes from silica-rich hydrothermal solutions or cooling magma.
Uses & applications
Used in electronics, glassmaking, abrasives, gemstones, and ornamental objects.
Geological facts
Quartz is one of the most abundant and widespread minerals on Earth's continental crust. It exhibits piezoelectric properties, meaning it can generate an electrical charge under mechanical stress.
Field identification & locations
Easily identified by its hardness (scratches glass), vitreous luster, and lack of cleavage. Found worldwide in almost 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