mineral
Quartz
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs scale), Color: White/Translucent/Clear, Luster: Vitreous/Glassy, Crystal Structure: Hexagonal (Trigonal), Cleavage: None/Indistinct, Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: White/Translucent/Clear, Luster: Vitreous/Glassy, Crystal Structure: Hexagonal (Trigonal), Cleavage: None/Indistinct, Specific Gravity: 2.65
Formation & geological history
Formed through the crystallization of magma or from hydrothermal veins. It is found in all types of geological environments and can be found in rocks from virtually every geological age.
Uses & applications
Extensively used in electronics (oscillators), glassmaking, abrasives, jewelry (as gemstones), and construction as a component of concrete and mortar.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. It is piezoelectric, meaning it generates an electric charge in response to applied mechanical stress.
Field identification & locations
Identify in the field by its hardness (scratches glass), lack of cleavage, and conchoidal fracture. Found globally, especially in riverbeds and mountainous terrain.
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Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous