gemstone

Dyed blue tumbled stone, likely turquoise or howlite

Most likely dyed magnesite/howlite (CaCO₃), possibly turquoise (hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O)

AI-generated identification · may be incorrect

Opaque vivid cyan-blue, glossy tumbled surface, fine-grained with dark pits or matrix; likely Mohs 3–4 if dyed howlite/magnesite, or 5–6 if turquoise. No visible crystal faces; turquoise has a waxy luster and irregular fracture.

Identified August 11, 2026More gemstone →

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At a glance

Common name: Dyed blue tumbled stone, likely turquoise or howlite
Scientific name: Most likely dyed magnesite/howlite (CaCO₃), possibly turquoise (hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O)
Category: gemstone
Identified: August 11, 2026
Method: Standard

AI Estimated Value

$1–$10 as a common dyed tumbled stone; approximately $20–$200+ if confirmed as quality natural turquoise.

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

Howlite and magnesite form in borate-rich sedimentary or hydrothermal settings; turquoise forms by alteration of aluminum-rich rocks in arid climates, commonly within the last several million years. The intense, uniform color strongly suggests dyeing or stabilization.

Uses & applications

Used as an inexpensive bead, cabochon, decorative stone, or lapidary material; genuine turquoise is also used in jewelry and ornamental work.

Geological facts

Dyed howlite is commonly marketed as “turquoise,” “turquenite,” or imitation turquoise. Acetone may remove dye from an inconspicuous area, while a hardness or streak test can help distinguish it.

Field identification & locations

Common sources include the United States, Mexico, China, and Turkey; inspect for uniform color, porous texture, and dye concentrated in cracks. A laboratory test is needed for reliable identification.