sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, typically opaque green with red or brown inclusions, vitreous to dull luster, and conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, typically opaque green with red or brown inclusions, vitreous to dull luster, and conchoidal fracture.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks, where silica-rich fluids precipitate quartz in pore spaces over millions of years.
Uses & applications
Widely used for ornamental carvings, cabochons, jewelry, and as a decorative lapidary material.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry due to its toughness and ability to take a high polish.
Field identification & locations
Identify in the field by its waxy luster, hardness that scratches glass, and opaque earthy tones; commonly found in riverbeds and hydrothermal veins worldwide.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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