sedimentary
Jasper
Silicon dioxide (Microcrystalline Quartz, SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, red, brown, yellow, green, or multicolored, vitreous to dull luster, cryptocrystalline crystal structure, conchoidal fracture with no cleavage, specific gravity of 2.58 to 2.91.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, red, brown, yellow, green, or multicolored, vitreous to dull luster, cryptocrystalline crystal structure, conchoidal fracture with no cleavage, specific gravity of 2.58 to 2.91.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks where silica-rich fluids replace organic material or fill cavities over millions of years.
Uses & applications
Used widely in ornamental carvings, cabochons, jewelry, and polished decorative specimens.
Geological facts
Jasper has been used since ancient times for amulets, seals, and tools, and is mentioned in various historical texts.
Field identification & locations
Easily identified by its opaque nature, waxy luster, and conchoidal fracture. Commonly found in riverbeds, mountainous regions, and areas of ancient volcanic activity.
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