sedimentary
Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness 6.5 to 7 on Mohs scale; displays mottled red, brown, and cream bands; waxy to vitreous luster; microcrystalline or cryptocrystalline crystal structure.
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Physical properties
Hardness 6.5 to 7 on Mohs scale; displays mottled red, brown, and cream bands; waxy to vitreous luster; microcrystalline or cryptocrystalline crystal structure.
Formation & geological history
Formed through the silification of sedimentary or volcanic rocks, where silica-rich fluids precipitate microcrystalline quartz in fractures or cavities.
Uses & applications
Used primarily in lapidary arts, ornamental carvings, cabochons, and as a collector specimen.
Geological facts
Jasper has been utilized since ancient times for talismans, seals, and weaponry components due to its fracture toughness.
Field identification & locations
Identify by its conchoidal fracture, lack of visible crystal grains, and opaque earthy patterns. Found worldwide in regions with ancient volcanic or hydrothermal activity.
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