mineral

Likely raw serpentine or green calcite specimen

Tentatively serpentine-group mineral, commonly antigorite or lizardite; alternatively pale green calcite

AI-generated identification · may be incorrect

Small, rough, pale green-and-white specimen with dull to waxy luster and irregular fracture. Serpentine hardness is about 2.5–4 Mohs; calcite is 3 and effervesces in dilute hydrochloric acid; crystal structure cannot be confirmed from the image.

Identified September 7, 2026More mineral →

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At a glance

Common name: Likely raw serpentine or green calcite specimen
Scientific name: Tentatively serpentine-group mineral, commonly antigorite or lizardite; alternatively pale green calcite
Category: mineral
Identified: September 7, 2026
Method: Standard

AI Estimated Value

Approximately $1–$10 as a common small rough specimen; more if confirmed as a desirable locality or gem-quality 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

Serpentine forms when ultramafic mantle rocks such as peridotite hydrate during tectonic alteration, commonly in ophiolites; calcite forms in veins or altered carbonate rocks. An exact age and identification require locality and testing.

Uses & applications

Serpentine is used decoratively and as a carving stone; calcite is important industrially in cement, lime, aggregates, and optical specimens. This small, unidentified piece has limited commercial value.

Geological facts

Green color alone is not diagnostic: chlorite, prehnite, epidote, and nephrite can look similar. A streak, acid test, hardness test, and locality information would greatly improve identification.

Field identification & locations

Commonly found in serpentinite belts and hydrothermal veins. Check for a soapy/waxy feel, fibrous texture, and lack of strong acid reaction for serpentine; vigorous fizz indicates calcite.