mineral
Clear Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness 7 on Mohs scale, transparent/colorless, vitreous (glassy) luster, trigonal crystal system, no cleavage, specific gravity ~2.65.
Identified More mineral →
Explore Clear Quartz in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness 7 on Mohs scale, transparent/colorless, vitreous (glassy) luster, trigonal crystal system, no cleavage, specific gravity ~2.65.
Formation & geological history
Forms in igneous, metamorphic, and sedimentary environments through hydrothermal fluids, magmatic crystallization, or solution deposition.
Uses & applications
Used in jewelry, electronics (piezoelectric applications, quartz oscillators), glassmaking, and gemstone collections.
Geological facts
Clear quartz is often referred to as Rock Crystal. The ancient Greeks believed it was ice frozen so hard that it would never melt.
Field identification & locations
Identify by its hardness (scratches glass), glass-like transparency, conchoidal fracture, and lack of true cleavage planes. Found abundantly worldwide.
More like this
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