sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5-7. Opaque, multicolored with patterns, waxy luster, trigonal crystal system with cryptocrystalline structure.
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Physical properties
Mohs hardness of 6.5-7. Opaque, multicolored with patterns, waxy luster, trigonal crystal system with cryptocrystalline structure.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks, precipitated from silica-rich fluids over millions of years.
Uses & applications
Used extensively in lapidary work for cabochons, beads, decorative carvings, and ornamental objects.
Geological facts
Ancient civilizations used jasper for amulets and seals due to its toughness and ability to take a high polish.
Field identification & locations
Identified by its opacity, fine-grained texture, and conchoidal fracture. Found worldwide in riverbeds and silicate-rich formations.
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