mineral
Blue Chalcedony
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5–7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline quartz structure, with a translucent soft sky-blue body color.
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Physical properties
Hardness of 6.5–7 on the Mohs scale, waxy to vitreous luster, cryptocrystalline quartz structure, with a translucent soft sky-blue body color.
Formation & geological history
Forms primarily in low-temperature volcanic and sedimentary cavities through precipitation from silica-rich groundwater.
Uses & applications
Predominantly fashioned into beads, cabochons, and ornamental jewelry pieces.
Geological facts
Its delicate blue color often results from the Rayleigh scattering of light caused by microscopic fluid or inclusion voids within the crystal matrix.
Field identification & locations
Recognized by its uniform soft blue glow, translucency, and absence of cleavage; widely sourced from Turkey, Namibia, and the USA.
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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