gemstone

Blue glassy mineral specimen, possibly blue topaz or aquamarine

Tentatively topaz (Al₂SiO₄(F,OH)₂) or beryl/aquamarine (Be₃Al₂Si₆O₁₈); identification is limited by severe image blur

AI-generated identification · may be incorrect

Appears translucent blue with vitreous luster and rounded or faceted surfaces. Topaz has Mohs hardness 8 and perfect basal cleavage; aquamarine has hardness 7.5–8, hexagonal crystals, and poor cleavage.

Identified August 16, 2026More gemstone →

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At a glance

Common name: Blue glassy mineral specimen, possibly blue topaz or aquamarine
Scientific name: Tentatively topaz (Al₂SiO₄(F,OH)₂) or beryl/aquamarine (Be₃Al₂Si₆O₁₈); identification is limited by severe image blur
Category: gemstone
Identified: August 16, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a small common treated specimen; $50–$500+ for attractive natural aquamarine or fine topaz, with exceptional gems worth substantially 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

Topaz forms in fluorine-rich granitic pegmatites and hydrothermal cavities; aquamarine forms mainly in granitic pegmatites. Both are commonly Paleozoic to Mesozoic or younger, depending on locality.

Uses & applications

Used as a gemstone in jewelry and as a collector specimen; blue topaz is commonly irradiated and heat-treated, while aquamarine is often heat-treated to improve color.

Geological facts

Natural blue topaz is uncommon; most commercial blue topaz is treated colorless topaz. Aquamarine is the blue variety of beryl and can occur in large, transparent crystals.

Field identification & locations

Check crystal habit, refractive properties, hardness, and inclusions; a clear photo or testing is needed to distinguish them from blue glass or synthetic material. Common sources include Brazil, Pakistan, Russia, Nigeria, and the United States.