mineral
Likely milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectWhite to translucent, glassy-to-dull luster, irregular fracture, and no visible cleavage; Mohs hardness 7, trigonal crystal structure, specific gravity about 2.65. The photo is not detailed enough to confirm the identification.
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Physical properties
White to translucent, glassy-to-dull luster, irregular fracture, and no visible cleavage; Mohs hardness 7, trigonal crystal structure, specific gravity about 2.65. The photo is not detailed enough to confirm the identification.
Formation & geological history
Quartz commonly crystallizes from silica-rich fluids in veins and pegmatites or occurs in igneous and metamorphic rocks; it forms across many geological ages.
Uses & applications
Quartz is used in glass and electronics; attractive specimens are collected or used in crafts and jewelry.
Geological facts
Milky color comes from microscopic fluid or gas inclusions that scatter light.
Field identification & locations
Look for hardness (it can scratch glass) and lack of cleavage; common worldwide, especially in quartz veins and granitic terrains. The small rough fragment shown has modest specimen value.
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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