sedimentary
Jasper with Quartz Vein
Microcrystalline quartz (SiO2) with quartz inclusion
AI-generated identification · may be incorrectMohs hardness of 6.5 to 7; reddish-brown color with a white or lighter quartz vein; waxy to dull luster; cryptocrystalline structure with conchoidal fracture.
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Physical properties
Mohs hardness of 6.5 to 7; reddish-brown color with a white or lighter quartz vein; waxy to dull luster; cryptocrystalline structure with conchoidal fracture.
Formation & geological history
Formed through the hydrothermal deposition of silica-rich fluids filling fractures in iron-rich sedimentary or volcanic rocks.
Uses & applications
Used primarily in lapidary arts for cabochons, carvings, ornamental objects, and as a collector specimen.
Geological facts
Jasper is an ancient gemstone utilized since antiquity for seals, talismans, and jewelry by various early civilizations.
Field identification & locations
Identify by its distinct reddish matrix cut by a contrasting light quartz vein, high hardness, and smooth waxy feel; commonly found in quartz-bearing gravels and hydrothermal veins worldwide.
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