mineral
Clear Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 (Mohs scale), Color: Colorless to white, Luster: Vitreous (glassy), Crystal Structure: Trigonal/Hexagonal, Cleavage: None/Conchoidal fracture, Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Colorless to white, Luster: Vitreous (glassy), Crystal Structure: Trigonal/Hexagonal, Cleavage: None/Conchoidal fracture, Specific Gravity: 2.65
Formation & geological history
Formed through the cooling and crystallization of silica-rich magma or via hydrothermal precipitation in veins and cavities. It can be found in igneous, metamorphic, and sedimentary environments.
Uses & applications
Used in electronics (as piezoelectric crystals), glassmaking, abrasives, jewelry (as a gemstone), and metaphysical practices.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. It is highly resistant to both mechanical and chemical weathering, which is why it is the primary component of most beach sand.
Field identification & locations
Identify in the field by its transparency, its ability to scratch glass (Mohs 7), and its characteristic conchoidal (shell-like) fracture. Found worldwide, with major deposits in Brazil and Arkansas, USA.
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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
Calcite–fluorite mineral specimen with iron-oxide staining
Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides
mineral
Granite
Granite (Phaneritic intrusive igneous rock)
igneous