sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
Hardness of 6.5 to 7 on the Mohs scale, opaque luster (waxy to dull), color varies widely including red, brown, yellow, green, and black, conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster (waxy to dull), color varies widely including red, brown, yellow, green, and black, conchoidal fracture with no true cleavage.
Formation & geological history
Formed by the precipitation of silica-rich fluids in sedimentary environments or volcanic ash beds, often dating from the Precambrian to Cenozoic eras.
Uses & applications
Used extensively for ornamental objects, cabochons, carved figurines, and gemstone jewelry as well as inLAPIDARY arts.
Geological facts
Jasper has been used by ancient civilizations since antiquity for tools, seals, and jewelry. It is mentioned in numerous ancient texts including biblical and classical literature.
Field identification & locations
Identified easily by its opaque nature, high hardness, and varied colorful patterns. Commonly found worldwide in riverbeds, sedimentary rock formations, and hydrothermal veins.
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