gemstone
Green Onyx
Chalcedony (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, vibrant green color, waxy to vitreous luster, microcrystalline quartz structure.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, vibrant green color, waxy to vitreous luster, microcrystalline quartz structure.
Formation & geological history
Formed by the deposition of silica from underground water in cavities of volcanic and sedimentary rocks.
Uses & applications
Widely used in high-end jewelry, decorative carvings, and as a popular ornamental gemstone.
Geological facts
Natural green onyx is extremely rare; most commercial green onyx is actually chalcedony or agate that has been artificially dyed.
Field identification & locations
Identified by its rich green hue, conchoidal fracture, and absence of visible cleavage; commonly sourced from India, Brazil, and Uruguay.
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