mineral
Milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectWhite, opaque to translucent, with a glassy-to-dull luster and no obvious cleavage; quartz has Mohs hardness 7 and a trigonal crystal structure. The small, irregular piece is consistent with milky quartz, though the photo alone cannot confirm its identity.
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Physical properties
White, opaque to translucent, with a glassy-to-dull luster and no obvious cleavage; quartz has Mohs hardness 7 and a trigonal crystal structure. The small, irregular piece is consistent with milky quartz, though the photo alone cannot confirm its identity.
Formation & geological history
Quartz commonly forms as crystals in silica-rich hydrothermal veins and pegmatites, or as grains in many rocks; it occurs from ancient to recent geological settings.
Uses & applications
Quartz is used in glassmaking, electronics, abrasives, and decorative objects; this small fragment has little material or jewelry value.
Geological facts
Quartz breaks with a curved, conchoidal fracture rather than splitting along cleavage planes.
Field identification & locations
Look for hardness sufficient to scratch ordinary glass and the absence of cleavage; milky quartz is widespread in veins and in weathered gravel. A closer inspection or simple hardness test would help distinguish it from other white minerals.
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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