sedimentary
Jasper and Chalcedony
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, earthy brown and bluish-gray colors, waxy to vitreous luster, microcrystalline structure with conchoidal fracture.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, earthy brown and bluish-gray colors, waxy to vitreous luster, microcrystalline structure with conchoidal fracture.
Formation & geological history
Formed via the precipitation of silica-rich fluids within cavities of sedimentary or volcanic rocks over millions of years.
Uses & applications
Used primarily in lapidary arts, ornamental carvings, cabochons, and as a collectible mineral specimen.
Geological facts
The brown crust often consists of iron-rich jasper encapsulating translucent bluish chalcedony, creating a striking contrast.
Field identification & locations
Identify by its hardness, conchoidal fracture, and waxy luster; commonly found in weathering zones and hydrothermal veins worldwide.
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