mineral

Blue-green fluorite or copper-bearing mineral specimen

Fluorite (CaF₂), tentatively; blue-green coloration may indicate trace copper or other impurities

AI-generated identification · may be incorrect

Small rough fragment with pale blue-green translucent areas, vitreous luster, and apparent cleavage surfaces. Fluorite has Mohs hardness 4, cubic crystal structure, perfect octahedral cleavage, and specific gravity about 3.18; exact identification requires testing.

Identified September 7, 2026More mineral →

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At a glance

Common name: Blue-green fluorite or copper-bearing mineral specimen
Scientific name: Fluorite (CaF₂), tentatively; blue-green coloration may indicate trace copper or other impurities
Category: mineral
Identified: September 7, 2026
Method: Standard

AI Estimated Value

About $2–$15 for a small ordinary fragment; $20–$100+ for attractive, strongly fluorescent, or well-crystallized specimens.

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

Likely formed in hydrothermal veins, where mineral-rich fluids deposited fluorite in fractures; age depends on locality, commonly Paleozoic to Mesozoic or younger. The photograph alone cannot establish geological age or locality.

Uses & applications

Fluorite is used as a flux in steel and aluminum production, a source of fluorine, and occasionally as a decorative or lapidary material.

Geological facts

Fluorite commonly fluoresces blue, purple, green, or cream under ultraviolet light. Its cubic cleavage and relatively soft surface distinguish it from harder blue-green quartz.

Field identification & locations

Check for octahedral cleavage, hardness near 4, and possible UV fluorescence; avoid scratching valuable material. Common sources include China, Mexico, Illinois, England, and Spain.