metamorphic

Polished serpentine (likely bowenite)

Serpentine-group minerals, chiefly antigorite and/or lizardite; commonly Mg3Si2O5(OH)4

AI-generated identification · may be incorrect

Dark green to yellow-green, mottled and highly polished with waxy-to-greasy luster; typically massive and opaque to slightly translucent. Hardness is about 2.5–5.5 Mohs, with no obvious cleavage and specific gravity around 2.5–2.7.

Identified September 12, 2026More metamorphic →

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Physical properties

Formation & geological history

Forms when magnesium-rich ultramafic rocks such as peridotite hydrate during low-temperature metamorphism, commonly in ancient oceanic lithosphere and subduction zones. The pictured item is shaped and polished, obscuring its original texture and age.

Uses & applications

Used as an ornamental stone for carvings, worry stones, beads, cabochons, and decorative objects; some varieties are sold as “New Jade.” It is generally unsuitable for demanding construction applications because it is relatively soft.

Geological facts

Serpentine is a mineral group rather than one single mineral; green coloration commonly comes from iron and nickel. It can resemble jade, but most serpentine is softer and less tough than true jadeite or nephrite.

Field identification & locations

Identify by its mottled green color, waxy polish, low hardness, and commonly soapy feel; a steel point may scratch it, unlike jade. Common sources include California, New Zealand, Italy, Canada, and Afghanistan; this specimen cannot be confirmed visually with certainty.