sedimentary
Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, colors range from yellow, brown, red, green, to multicolored, waxy to vitreous luster, cryptocrystalline crystal structure, conchoidal fracture, specific gravity of 2.58 to 2.91.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, colors range from yellow, brown, red, green, to multicolored, waxy to vitreous luster, cryptocrystalline crystal structure, conchoidal fracture, specific gravity of 2.58 to 2.91.
Formation & geological history
Formed from silica-rich solutions precipitating in sedimentary environments or hydrothermal veins, often originating from ancient marine or terrestrial deposits millions of years old.
Uses & applications
Used in ornamental carvings, lapidary art, jewelry, and prized as a collector's mineral specimen.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry components like arrowheads due to its toughness and ability to take a high polish.
Field identification & locations
Can be identified in the field by its opaque nature, waxy luster, conchoidal fracture, and colorful banding or patterns. Commonly found in riverbeds, mountainous regions, and areas with volcanic or sedimentary history.
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