gemstone

Tumbled blue-green stone, possibly aquamarine or chalcedony

Indeterminate from image; possibilities include beryl (Be₃Al₂Si₆O₁₈) or cryptocrystalline quartz (SiO₂)

AI-generated identification · may be incorrect

Small rounded, polished specimen with pale blue-green color, translucent edges, and vitreous to waxy luster. Aquamarine is Mohs 7.5–8 with hexagonal crystals; chalcedony is Mohs 6.5–7 and lacks visible crystals.

Identified September 12, 2026More gemstone →

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At a glance

Common name: Tumbled blue-green stone, possibly aquamarine or chalcedony
Scientific name: Indeterminate from image; possibilities include beryl (Be₃Al₂Si₆O₁₈) or cryptocrystalline quartz (SiO₂)
Category: gemstone
Identified: September 12, 2026
Method: Standard

AI Estimated Value

Approximately $1–$20 as a small common tumbled stone; confirmed gem-quality aquamarine could be worth $20–$200+.

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

Aquamarine forms in granite-related pegmatites, while blue-green chalcedony forms from silica-rich fluids in cavities and fractures. Both are geologically ancient, commonly ranging from Precambrian to younger host-rock ages.

Uses & applications

Used as a jewelry gemstone or inexpensive polished collectible; exact value depends strongly on confirmed identity, color, transparency, and size.

Geological facts

The image lacks diagnostic features such as crystal form, cleavage, inclusions, or matrix, so identification is provisional; dyed glass or synthetic material is also possible.

Field identification & locations

Check hardness, specific gravity, magnification, and refractive index; aquamarine typically shows strong transparency and hexagonal growth, whereas chalcedony is waxier and more evenly cloudy. Common sources include Brazil, Pakistan, Madagascar, and Namibia.