mineral
Green Jasper / Bloodstone
SiO2 (Microcrystalline Quartz)
Mohs hardness of 6.5-7, deep green color with opaque transparency, waxy to vitreous luster, conchoidal fracture, trigonal crystal system.
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Physical properties
Mohs hardness of 6.5-7, deep green color with opaque transparency, waxy to vitreous luster, conchoidal fracture, trigonal crystal system.
Formation & geological history
Forms in low-temperature hydrothermal environments or secondary silica deposition in volcanic and sedimentary rocks where iron silicates give it a distinct deep green hue.
Uses & applications
Popular for lapidary work, cabochons, carvings, ornamental pieces, and gemstone jewelry.
Geological facts
Green jasper has been prized since antiquity; ancient civilizations used it to carve seals, amulets, and decorative items.
Field identification & locations
Identified by its waxy luster, microcrystalline structure, conchoidal fracture, and inability to be scratched by steel. Commonly found in basaltic lava cavities and river gravels in India, Brazil, Australia, and the USA.
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