gemstone

Green garnet (likely tsavorite or demantoid), small polished cabochon

Garnet-group silicate; tsavorite is grossular, Ca₃Al₂(SiO₄)₃, while demantoid is andradite, Ca₃Fe₂(SiO₄)₃

AI-generated identification · may be incorrect

Green, translucent to opaque, vitreous luster, typically cubic crystal system, no cleavage, Mohs hardness 6.5–7.5. The photo does not show enough detail to distinguish garnet from other green stones or imitations.

Identified October 12, 2026More gemstone →

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At a glance

Common name: Green garnet (likely tsavorite or demantoid), small polished cabochon
Scientific name: Garnet-group silicate; tsavorite is grossular, Ca₃Al₂(SiO₄)₃, while demantoid is andradite, Ca₃Fe₂(SiO₄)₃
Category: gemstone
Identified: October 12, 2026
Method: Standard

AI Estimated Value

About $1–$30 for a small common or unidentified stone; fine, confirmed tsavorite or demantoid can be worth much 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

Natural garnets crystallize in metamorphic rocks or, for some varieties, altered ultramafic rocks; their ages vary widely. Tsavorite is associated especially with East African metamorphic deposits, while demantoid is known from Russia and other regions.

Uses & applications

Used as gemstones in jewelry and valued by collectors; garnet varieties are also used as abrasives.

Geological facts

Garnets are a mineral group rather than a single species, and green varieties can differ substantially in composition and value.

Field identification & locations

A gemological test is needed for reliable identification; inspect under magnification for natural inclusions and have refractive index or spectroscopy measured. The image alone cannot establish locality or whether the stone is natural.