metamorphic

Banded green stone, likely serpentinite

Serpentinite (rock composed chiefly of serpentine-group minerals; exact identification requires testing)

AI-generated identification · may be incorrect

Dark green to gray-green with pale parallel bands and a dull to slightly waxy luster; serpentinite is commonly soft (about 2.5–4 Mohs), but hardness and banding vary with accessory minerals. The specimen appears naturally fractured and may show foliation or veining.

Identified September 29, 2026More metamorphic →

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At a glance

Common name: Banded green stone, likely serpentinite
Scientific name: Serpentinite (rock composed chiefly of serpentine-group minerals; exact identification requires testing)
Category: metamorphic
Identified: September 29, 2026
Method: Standard

AI Estimated Value

About $2–$20 for a small, common rough specimen; higher values require confirmed identity, attractive patterns, or provenance.

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 ultramafic rocks, especially peridotite, during metamorphism; it can occur in ancient and modern tectonic plate-boundary settings. The image does not establish its age or exact locality.

Uses & applications

Serpentinite is used as decorative stone, carvings, and occasionally dimension stone; identification is needed before assigning a specific commercial use.

Geological facts

The green color commonly comes from serpentine minerals, sometimes with magnetite or other dark accessories. Similar-looking banded rocks include green schist and other metamorphic stones.

Field identification & locations

Look for a green color, waxy feel, relatively low hardness, and veins or mesh-like alteration texture; avoid relying on color alone. Serpentinite occurs in many mountain belts and ophiolite complexes.