mineral
Milky Quartz (Tumbled Chalcedony)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness 7, translucent to opaque milky-white color, vitreous to waxy luster, trigonal crystal system, conchoidal fracture.
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Physical properties
Mohs hardness 7, translucent to opaque milky-white color, vitreous to waxy luster, trigonal crystal system, conchoidal fracture.
Formation & geological history
Forms in hydrothermal veins, pegmatites, and sedimentary environments as silica precipitates from cooling aqueous solutions.
Uses & applications
Commonly used in jewelry, cabochons, metaphysical healing practices, and tumbled stone collections.
Geological facts
Its cloudy white appearance is caused by microscopic fluid inclusions trapped during the crystal's rapid formation.
Field identification & locations
Identified by its quartz hardness (cannot be scratched by a steel nail) and translucent, milky appearance lacking cleavage planes; widespread globally.
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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
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