metamorphic
Serpentine (likely bowenite/serpentine jade)
Serpentine-group minerals, chiefly antigorite and lizardite; commonly Mg₃Si₂O₅(OH)₄
AI-generated identification · may be incorrectOlive to yellow-green, waxy to greasy luster, opaque, with dark magnetite/chromite inclusions and white veining; Mohs hardness 2.5–4, monoclinic/triclinic crystal structures, generally poor cleavage. The smoothly polished, wedge-shaped piece appears lapidary-cut rather than natural.
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Physical properties
Olive to yellow-green, waxy to greasy luster, opaque, with dark magnetite/chromite inclusions and white veining; Mohs hardness 2.5–4, monoclinic/triclinic crystal structures, generally poor cleavage. The smoothly polished, wedge-shaped piece appears lapidary-cut rather than natural.
Formation & geological history
Forms when ultramafic mantle rocks such as peridotite hydrate during low-temperature metamorphism; commonly Paleozoic to Cenozoic in ophiolite belts and subduction zones. Exact age cannot be determined from the photograph.
Uses & applications
Carved ornaments, cabochons, beads, decorative stone, and historical architectural material; translucent, harder bowenite varieties are sometimes marketed as “New Jade.”
Geological facts
Serpentine is not true jade, although its green color can resemble jadeite or nephrite. Some varieties contain asbestos-form minerals, so avoid cutting or generating dust unless composition is confirmed.
Field identification & locations
Look for low hardness, waxy green appearance, dark specks, and a soapy feel; it can often be scratched by a steel blade. Common localities include California, New Zealand, Italy, Canada, and Afghanistan.
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