mineral
Chalcedony
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy luster, translucent to opaque transparency, and cryptocrystalline structure with no visible cleavage.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy luster, translucent to opaque transparency, and cryptocrystalline structure with no visible cleavage.
Formation & geological history
Forms in low-temperature hydrothermal environments and as deposits in volcanic cavities or sedimentary rocks.
Uses & applications
Commonly used in ornamental carvings, lapidary art, and affordable jewelry.
Geological facts
Chalcedony is the parent mineral for many well-known varieties like agate, jasper, and onyx.
Field identification & locations
Identify by its waxy luster, microcrystalline texture, and conchoidal fracture. Found worldwide.
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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