metamorphic
Polished serpentine (likely bowenite)
Serpentine-group minerals, chiefly antigorite; bowenite is a nickel-rich translucent variety
AI-generated identification · may be incorrectTypically pale green to yellow-green with cloudy mottling, waxy-to-greasy luster, and polished surface; Mohs hardness about 2.5–4, no obvious cleavage, fine-grained massive structure, and specific gravity around 2.5–2.6.…
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Physical properties
Typically pale green to yellow-green with cloudy mottling, waxy-to-greasy luster, and polished surface; Mohs hardness about 2.5–4, no obvious cleavage, fine-grained massive structure, and specific gravity around 2.5–2.6. The rounded form and translucency are consistent with a tumbled specimen, though the image cannot confirm the exact mineral.
Formation & geological history
Forms when ultramafic rocks such as peridotite are hydrated during metamorphism, commonly along tectonic plate boundaries; alteration can occur from Precambrian to modern geological settings. Nickel-rich bowenite is especially associated with serpentinite bodies.
Uses & applications
Used for carvings, beads, cabochons, ornamental stone, and occasionally architectural decoration; it is generally a modest-value gemstone material.
Geological facts
Serpentine is a mineral group rather than one single mineral, and its green color may result from iron and nickel. It can resemble jade, but is usually softer and less durable.
Field identification & locations
Common localities include New Zealand, Afghanistan, China, Italy, Canada, and the United States. Field clues are low hardness, waxy feel, green veining, and possible scratching by a steel knife; avoid acid or destructive tests on polished pieces.
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