mineral

Green glassy mineral specimen, likely rough emerald or green fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph

AI-generated identification · may be incorrect

Transparent to translucent vivid green, vitreous luster, irregular fracture, and no obvious crystal faces. Emerald hardness is 7.5–8 Mohs; fluorite is softer at 4, with cubic cleavage. The intense uniform color and rounded-looking surfaces warrant testing for glass or treated material.

Identified August 14, 2026More mineral →

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At a glance

Common name: Green glassy mineral specimen, likely rough emerald or green fluorite
Scientific name: Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph
Category: mineral
Identified: August 14, 2026
Method: Standard

AI Estimated Value

Common rough green mineral: $5–$50; genuine rough emerald: roughly $20–$500+, but gem-quality material can be far more valuable. If glass: under $5.

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 emerald forms in hydrothermal veins and pegmatitic environments, commonly with mica, quartz, and feldspar; Brazilian emeralds are generally Precambrian to Paleozoic in host rocks. The Minas Gerais region near 20.1°S, 42.0°W is geologically plausible for emerald- and tourmaline-bearing rocks.

Uses & applications

Gem-quality emerald is cut for jewelry; non-gem material is collected. Green fluorite is ornamental and industrial, while glass has no geological value.

Geological facts

A refractive-index test, specific gravity, and microscopy are needed for reliable identification; bubbles would strongly suggest glass.

Field identification & locations

Likely regional alternatives include green tourmaline (elbaite), emerald, or green fluorite. Check for hexagonal prismatic structure, inclusions, cleavage, and bubbles; avoid destructive tests.