mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale. Color is predominantly white to translucent. Luster is vitreous to greasy. Crystal system is trigonal. Conchoidal fracture with no true cleavage. Specific gravity is 2.65.
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Physical properties
Hardness of 7 on the Mohs scale. Color is predominantly white to translucent. Luster is vitreous to greasy. Crystal system is trigonal. Conchoidal fracture with no true cleavage. Specific gravity is 2.65.
Formation & geological history
Forms in a wide variety of geological environments, most commonly as a primary mineral in igneous rocks like granite and pegmatites, in hydrothermal veins, and as detrital grains in sedimentary rocks.
Uses & applications
Used in electronics, oscillators, glass manufacture, abrasive materials, and as a popular gemstone or mineral specimen for collectors.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electrical charge in response to applied mechanical stress.
Field identification & locations
Easily identified by its characteristic high hardness (scratches glass), lack of cleavage, and conchoidal fracture. Found worldwide in nearly every geological setting.
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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