gemstone
Chrysoprase
Chalcedony (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, apple-green to dark green color, waxy to vitreous luster, and microcrystalline trigonal crystal structure.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, apple-green to dark green color, waxy to vitreous luster, and microcrystalline trigonal crystal structure.
Formation & geological history
Formed in hydrothermal veins and weathered nickel-bearing serpentine rocks through low-temperature silica deposition.
Uses & applications
Used primarily in fine jewelry, rings, pendants, and decorative carvings.
Geological facts
Chrysoprase is the most valuable variety of chalcedony due to its distinct apple-green color, which is caused by trace amounts of nickel.
Field identification & locations
Identified by its vivid green hue and lack of visible crystal structure; commonly sourced from Australia, Germany, and Poland.
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