sedimentary
Jasper
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7. Displays varied earthy tones of red, yellow, and brown with a waxy to dull luster and conchoidal fracture.
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Physical properties
Mohs hardness of 6.5 to 7. Displays varied earthy tones of red, yellow, and brown with a waxy to dull luster and conchoidal fracture.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks where silica-rich fluids replace original minerals over millions of years.
Uses & applications
Widely used for ornamental carvings, cabochons in jewelry, and decorative stone collecting.
Geological facts
Jasper has been utilized since ancient times for talismans, seals, and weaponry components like arrowheads due to its toughness.
Field identification & locations
Identified by its opaque appearance, fine-grained microcrystalline quartz structure, and lack of cleavage. Found globally in ancient riverbeds and volcanic deposits.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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