mineral
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness 7 on Mohs scale, milky white to yellowish-orange hue due to iron oxide staining, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, no cleavage.
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Physical properties
Hardness 7 on Mohs scale, milky white to yellowish-orange hue due to iron oxide staining, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, no cleavage.
Formation & geological history
Formed in igneous, metamorphic, and sedimentary environments through hydrothermal fluids filling veins and cavities. Very common worldwide.
Uses & applications
Used widely in glassmaking, electronics (piezoelectric properties), abrasives, gemstone jewelry, and decorative stone collections.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Iron oxide coatings often give clear or milky quartz a warm orange or reddish coat.
Field identification & locations
Identified by its ability to scratch glass (hardness 7), lack of cleavage, and characteristic conchoidal fracture. Found virtually anywhere in granite terrains and gravel beds.
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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
Calcite–fluorite mineral specimen with iron-oxide staining
Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides
mineral