sedimentary
Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, comes in various colors including red, brown, yellow, and green due to iron impurities, conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque luster, comes in various colors including red, brown, yellow, and green due to iron impurities, conchoidal fracture.
Formation & geological history
Formed from silica-rich solutions in sedimentary or volcanic environments, often through the replacement of organic material or deposition in marine basins.
Uses & applications
Used for ornamental objects, cabochons, carvings, and jewelry making.
Geological facts
Jasper has been used since ancient times for seals, talismans, and jewelry, referenced in numerous ancient texts including the Bible.
Field identification & locations
Identified by its opaque nature, waxy luster, and colorful banding or patterns. Found worldwide in riverbeds, mountainous regions, and sedimentary deposits.
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