mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, translucent pale blue color, waxy to vitreous luster, and cryptocrystalline structure with no cleavage.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, translucent pale blue color, waxy to vitreous luster, and cryptocrystalline structure with no cleavage.
Formation & geological history
Forms in low-temperature hydrothermal veins and cavities within volcanic or sedimentary rocks through the deposition of silica-rich fluids.
Uses & applications
Widely used in jewelry, ornamental carvings, lapidary arts, and sought after by mineral collectors.
Geological facts
Blue chalcedony gets its gentle coloration from microscopic inclusions and Rayleigh scattering of light within the quartz matrix. Ancient civilizations prized it for carved seals and talismans.
Field identification & locations
Identified by its waxy luster, conchoidal fracture, and distinct blue hue. Commonly sourced from deposits in the USA, Turkey, and Namibia.
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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