mineral
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, orange to brown color with a waxy to vitreous luster, cryptocrystalline structure, and no cleavage.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, orange to brown color with a waxy to vitreous luster, cryptocrystalline structure, and no cleavage.
Formation & geological history
Formed by the precipitation of silica-rich solutions in cavities and fractures of host rocks at low temperatures.
Uses & applications
Used primarily in lapidary work, ornamental carvings, and as collectible mineral specimens.
Geological facts
The botryoidal habit forms distinct grape-like clusters due to surface tension during rapid colloidal silica deposition.
Field identification & locations
Easily identified by its distinctive rounded, bubble-like surface texture and high hardness; commonly found globally in volcanic and sedimentary environments.
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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