metamorphic

Pale green-gray stone, possibly serpentinite

Serpentinite (rock composed mainly of serpentine-group minerals)

AI-generated identification · may be incorrect

The rough, opaque specimen appears pale green-gray with a dull to slightly waxy luster. Serpentine minerals have Mohs hardness about 2.5–5.5 and a monoclinic or fibrous structure; the image does not show diagnostic details clearly enough for a firm identification.

Identified September 23, 2026More metamorphic →

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Physical properties

Formation & geological history

Serpentinite forms when water alters magnesium-rich ultramafic rocks, commonly at or near tectonic plate boundaries. This process has occurred throughout geological history; the specimen’s age and exact origin cannot be determined from the image.

Uses & applications

Serpentinite is used as decorative or carving stone and, where suitable, as facing or landscaping material. Some varieties are polished for ornaments.

Geological facts

The photograph shows a small, unpolished-looking fragment, but visual appearance alone cannot confirm its mineral composition.

Field identification & locations

A green color and waxy feel can suggest serpentinite; test hardness and look for slick, fibrous surfaces, while avoiding identification by color alone. Serpentinite occurs in ultramafic-rock belts worldwide.