sedimentary
Green Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, opaque green color due to iron impurities, waxy to vitreous luster, trigonal crystal system, conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque green color due to iron impurities, waxy to vitreous luster, trigonal crystal system, conchoidal fracture.
Formation & geological history
Formed by the precipitation of silica from aqueous solutions, often in marine environments or volcanic ash beds, undergoing lithification over millions of years.
Uses & applications
Used primarily in lapidary arts, making ornamental carvings, beads, cabochons for jewelry, and as a collector's specimen.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry. Green varieties are often associated with balancing energy and grounding.
Field identification & locations
Can be identified in the field by its hardness (scratches glass), waxy luster, and opaque green coloration without visible crystal grains. Found worldwide in regions with ancient sedimentary and volcanic deposits.
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