mineral
Quartz (Milky or Druzy Quartz)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 (Mohs scale), Color: White to translucent, Luster: Vitreous to greasy, Crystal structure: Hexagonal/Trigonal, cleavage: Indistinct/conchoidal fracture, Specific gravity: 2.65
Identified More mineral →
Explore Quartz (Milky or Druzy Quartz) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 (Mohs scale), Color: White to translucent, Luster: Vitreous to greasy, Crystal structure: Hexagonal/Trigonal, cleavage: Indistinct/conchoidal fracture, Specific gravity: 2.65
Formation & geological history
Formed through hydrothermal processes, cooling of igneous magma, or precipitation from silica-rich fluids in rock cavities. Common throughout all geological ages.
Uses & applications
Used in glass manufacturing, electronics (piezoelectric properties), abrasives, and as semi-precious gemstones/jewelry.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'Quarz', which originally meant 'hard'.
Field identification & locations
Identify by its hardness (it can scratch glass), its lack of cleavage, and its characteristic waxy or glassy luster. Found globally in almost all geological environments.
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
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
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