mineral
Quartz Geode
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, colorless or white crystals, and hexagonal crystal system.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, colorless or white crystals, and hexagonal crystal system.
Formation & geological history
Formed when mineral-rich groundwater deposits silica inside hollow cavities of sedimentary or volcanic rocks over millions of years.
Uses & applications
Widely used in decorative displays, crystal healing, lapidary arts, and as mineral collector specimens.
Geological facts
Geodes start as bubbles in rock or animal cavities where silica slowly crystallizes inward, creating hollow interior crystal linings.
Field identification & locations
Found globally in limestone deposits and volcanic ash beds; easily identified by a rough outer nodule shell concealing sparkling interior crystals.
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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
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous