mineral
Clear Quartz Sphere (Rock Crystal)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness 7 on Mohs scale; colorless and transparent with vitreous luster, trigonal crystal system, and conchoidal fracture.
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Physical properties
Hardness 7 on Mohs scale; colorless and transparent with vitreous luster, trigonal crystal system, and conchoidal fracture.
Formation & geological history
Crystallizes in igneous pegmatites and hydrothermal veins under high pressure and temperature conditions over geological timescales.
Uses & applications
Used in ornamental carvings, scrying crystal balls, jewelry, metaphysics, and historically in optics and electronics.
Geological facts
Ancient Greeks believed rock crystal was permanently frozen ice (krystallos) that would never melt.
Field identification & locations
Distinguishable from man-made glass by cold thermal feel, polariscope optical birefringence, and lack of spherical gas bubbles; major sources include Brazil, Madagascar, and Arkansas.
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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