metamorphic
Jasper Veined Greenstone
Metamorphosed mafic volcanic rock with quartz-jasper vein
AI-generated identification · may be incorrectHardness of 6-7 on Mohs scale, dark green base color with prominent red and yellow jasper/quartz banding, vitreous to dull luster.
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Physical properties
Hardness of 6-7 on Mohs scale, dark green base color with prominent red and yellow jasper/quartz banding, vitreous to dull luster.
Formation & geological history
Formed through low-grade regional metamorphism of ancient submarine basaltic lava flows, subsequently fractured and hydrothermally healed with silica-rich fluids.
Uses & applications
Used primarily as a decorative landscaping stone, in lapidary arts for cabochons, and as a collectible specimen.
Geological facts
The contrasting red and green colors are often marketed as unakite-like variations or proprietary local trade names depending on the region.
Field identification & locations
Identify by its dense dark green matrix crossed by distinct colorful microcrystalline quartz veins, commonly found in glacial till and river gravels.
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