mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, pale blue to greyish-blue color, waxy to vitreous luster, and microcrystalline structure.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, pale blue to greyish-blue color, waxy to vitreous luster, and microcrystalline structure.
Formation & geological history
Forms in low-temperature hydrothermal environments and cavities of volcanic rocks by the precipitation of silica-rich solutions.
Uses & applications
Used in ornamental carvings, gemstone jewelry, and lapidary work.
Geological facts
Chalcedony has been used since ancient times for intricate seals, signet rings, and carvings across various civilizations.
Field identification & locations
Identify by its waxy luster, conchoidal fracture, and characteristic translucent blue banding; found worldwide in volcanic deposits.
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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