metamorphic

Serpentine-rich rock (likely antigorite serpentinite)

Serpentinite, composed mainly of serpentine-group minerals such as antigorite, lizardite, or chrysotile

AI-generated identification · may be incorrect

Pale yellow-green with dark gray veining and a dull to waxy luster; serpentine minerals have Mohs hardness about 2.5–4 and commonly form fine-grained, massive aggregates. The visible specimen is too small to assess texture or confirm its mineral identity reliably.

Identified September 23, 2026More metamorphic →

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At a glance

Common name: Serpentine-rich rock (likely antigorite serpentinite)
Scientific name: Serpentinite, composed mainly of serpentine-group minerals such as antigorite, lizardite, or chrysotile
Category: metamorphic
Identified: September 23, 2026
Method: Standard

AI Estimated Value

Approximately $2–$20 for a small common rough specimen; higher-quality polished or collectible pieces may cost more.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Forms when water alters magnesium-rich mantle rocks, commonly peridotite, during serpentinization; this process occurs in oceanic crust and along tectonic plate boundaries. The age depends on the locality and cannot be determined from the image.

Uses & applications

Serpentinite is used as decorative stone, carved objects, and sometimes dimension stone; mineral identification is needed before handling or working it because some serpentinites contain asbestos-form chrysotile.

Geological facts

The contrasting gray material may be another mineral or host rock, but the image alone does not establish its identity. Serpentinite often shows mottled green colors and a smooth, soapy feel.

Field identification & locations

Look for green coloration, waxy surfaces, and association with ultramafic rocks in tectonic or mountain belts. A scratch test and mineralogical analysis can help distinguish it from other pale-green rocks.