gemstone
Green Opal
Hydrated amorphous silica (SiO2·nH2O)
AI-generated identification · may be incorrectHardness of 5.5 to 6.5 on the Mohs scale, earthy to vitreous luster, conchoidal fracture, and green color caused by nickel impurities.
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Physical properties
Hardness of 5.5 to 6.5 on the Mohs scale, earthy to vitreous luster, conchoidal fracture, and green color caused by nickel impurities.
Formation & geological history
Forms from low-temperature deposition of silica-rich groundwater in sedimentary or volcanic crevices.
Uses & applications
Used primarily in lapidary work, jewelry, and mineral collections.
Geological facts
Green opal is often associated with emotional renewal and healing in crystal healing traditions.
Field identification & locations
Identified by its waxy-to-vitreous luster, conchoidal fracture, and lack of cleavage; found globally including in Madagascar, Brazil, and Australia.
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