mineral
Quartz Geode
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness 7 on Mohs scale, transparent to white color, vitreous luster, hexagonal crystal system, no cleavage, specific gravity 2.65.
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Physical properties
Hardness 7 on Mohs scale, transparent to white color, vitreous luster, hexagonal crystal system, no cleavage, specific gravity 2.65.
Formation & geological history
Formed when mineral-rich groundwater deposits silica inside hollow cavities in sedimentary or volcanic rocks over millions of years.
Uses & applications
Used in decorative specimens, crystal healing, and jewelry, as well as industrial applications like electronics and glassmaking.
Geological facts
Geodes appear as ordinary rocks on the outside but conceal dazzling crystal formations within when cracked open.
Field identification & locations
Identify by its spherical, rough exterior and hollow interior lined with sparkling crystals; commonly found in limestone deserts and volcanic regions.
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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