mineral
Milky quartz
Quartz (SiO₂)
AI-generated identification · may be incorrectHardness 7 Mohs; translucent white to pale honey-colored, with a vitreous luster and uneven fracture. Trigonal crystal structure; no cleavage. The rough surface and lighting make the exact identification uncertain.
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Physical properties
Hardness 7 Mohs; translucent white to pale honey-colored, with a vitreous luster and uneven fracture. Trigonal crystal structure; no cleavage. The rough surface and lighting make the exact identification uncertain.
Formation & geological history
Quartz commonly forms as silica-rich fluids cool in veins and cavities, or crystallizes in igneous and metamorphic rocks. It occurs in rocks of many geological ages.
Uses & applications
Used in glassmaking, electronics, abrasives, and decorative objects; attractive pieces are collected or used in jewelry.
Geological facts
Quartz is among Earth’s most abundant minerals and is piezoelectric, producing an electrical charge under mechanical stress.
Field identification & locations
Look for hardness sufficient to scratch glass, no cleavage, and a glassy appearance; common worldwide in veins and many rock types. This specimen may also be another pale quartz variety.
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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