metamorphic

Polished green serpentine sphere

Serpentinite; chiefly serpentine-group minerals (antigorite, lizardite, chrysotile), commonly with magnetite

AI-generated identification · may be incorrect

Typically Mohs 2.5–4, dark green to mottled pale green, waxy to greasy luster, opaque to translucent; massive and fine-grained with no visible crystal cleavage. The pictured polished sphere shows characteristic cloudy green veining.

Identified September 18, 2026More metamorphic →

Explore Polished green serpentine sphere in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Polished green serpentine sphere
Scientific name: Serpentinite; chiefly serpentine-group minerals (antigorite, lizardite, chrysotile), commonly with magnetite
Category: metamorphic
Identified: September 18, 2026
Method: Standard

AI Estimated Value

About $20–$100 for a common polished sphere of this size; $100–$300+ for unusually attractive, large, or jade-like material.

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 ultramafic mantle rocks such as peridotite undergo hydrothermal alteration and hydration, commonly along tectonic plate boundaries; ages vary from Precambrian to modern. This specimen has been cut and polished.

Uses & applications

Used as ornamental stone, carvings, spheres, countertops, and decorative objects; historically used in some cultures for carving and architecture. Chrysotile-rich material should not be cut or abraded because of asbestos risk.

Geological facts

Serpentinite is named for its snake-skin-like appearance and commonly contains magnetite, giving some pieces weak magnetic response. It is softer and less durable than jade, despite occasional misleading trade names.

Field identification & locations

Identify by its mottled green color, waxy polish, low hardness, and commonly soapy feel; it can be scratched by a steel knife. Common sources include California, New Zealand, Italy, Canada, Russia, and Afghanistan.