sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness 6.5-7 on the Mohs scale, earthy to vitreous luster, opaque brown to red color, and conchoidal fracture with no cleavage.
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Physical properties
Hardness 6.5-7 on the Mohs scale, earthy to vitreous luster, opaque brown to red color, and conchoidal fracture with no cleavage.
Formation & geological history
Formed through the silification of sedimentary deposits or volcanic ash, occurring in ancient marine environments or hydrothermal veins.
Uses & applications
Used primarily for ornamental carvings, cabochons in jewelry, and as a popular collector specimen.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry. Its diverse colors stem from various mineral impurities like iron oxides.
Field identification & locations
Easily identified by its opaque nature, high hardness, and smooth waxy polish. Commonly found in riverbeds and mountainous regions worldwide.
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