Mineral
Quartz
SiO2 (Silicon Dioxide)
AI-generated identification · may be incorrectHardness 7, typically colorless to white, vitreous luster, conchoidal fracture, lacks cleavage.
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Physical properties
Hardness 7, typically colorless to white, vitreous luster, conchoidal fracture, lacks cleavage.
Formation & geological history
Forms in a wide range of geological environments, including igneous, metamorphic, and sedimentary rocks, often precipitating from silica-rich fluids.
Uses & applications
Used in glassmaking, electronics (oscillators), as an abrasive, and in jewelry or collecting.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust, coming in many varieties like amethyst, citrine, and rose quartz.
Field identification & locations
Identify by its hardness (scratches glass), lack of cleavage, and conchoidal fracture; commonly found worldwide in various rock types.
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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