mineral
Milky quartz
Quartz (SiO₂), likely massive milky quartz
AI-generated identification · may be incorrectWhite to pale honey-colored, translucent in places, with a vitreous luster and irregular fracture; Mohs hardness 7. Quartz has a trigonal crystal structure, but this specimen appears massive rather than distinctly crystal-terminated.
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Physical properties
White to pale honey-colored, translucent in places, with a vitreous luster and irregular fracture; Mohs hardness 7. Quartz has a trigonal crystal structure, but this specimen appears massive rather than distinctly crystal-terminated.
Formation & geological history
Forms when silica-rich fluids cool in cracks and veins, or crystallizes from magma and metamorphic fluids. Quartz occurs in rocks of many geological ages.
Uses & applications
Used in glassmaking, electronics, abrasives, and as a decorative or collecting stone; attractive pieces may be polished for jewelry.
Geological facts
Quartz is one of Earth’s most abundant minerals and is piezoelectric, producing an electrical charge under pressure.
Field identification & locations
The pale, glassy appearance and hardness are consistent with quartz, though a photo cannot confirm the identification; scratch testing glass can help distinguish it. Common worldwide in veins and pegmatites.
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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