sedimentary
Jasper
Microcrystalline quartz (SiO2)
AI-generated identification · may be incorrectHardness 6.5-7 on Mohs scale; opaque, displays varied earth-tone colors; vitreous to dull luster; trigonal crystal system.
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Physical properties
Hardness 6.5-7 on Mohs scale; opaque, displays varied earth-tone colors; vitreous to dull luster; trigonal crystal system.
Formation & geological history
Formed through the silification of sedimentary or volcanic deposits, often precipitating from silica-rich hydrothermal fluids.
Uses & applications
Used primarily in lapidary arts, ornamental carvings, and affordable gemstone jewelry.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry.
Field identification & locations
Identified by its opaque nature and fine-grained microcrystalline structure; found worldwide in riverbeds and mountainous regions.
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