mineral
Quartz Crystal
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale; Color is typically clear, white, or light yellowish-brown; Luster is vitreous (glassy); Crystal structure 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 typically clear, white, or light yellowish-brown; Luster is vitreous (glassy); Crystal structure is trigonal; Conchoidal fracture with no true cleavage; Specific gravity is 2.65.
Formation & geological history
Forms in a wide variety of geological environments, commonly precipitating from silica-rich hydrothermal veins, pegmatites, and as a primary constituent of igneous, metamorphic, and sedimentary rocks.
Uses & applications
Used in electronics, oscillators, glass manufacture, countertops, decorative items, and lapidary work.
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 electric charge under mechanical stress.
Field identification & locations
Identified by its high hardness (scratches glass), lack of cleavage, and distinct 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