mineral

Blue-and-white polished stone, likely dyed howlite or turquoise imitation

Probably dyed magnesite/howlite (CaCO₃), but the image is insufficient for confirmation

AI-generated identification · may be incorrect

Opaque sky-blue material with white/gray veining, waxy to glassy polish, and irregular tumbled form. If howlite or magnesite, hardness is about 3–4 Mohs; genuine turquoise is harder, about 5–6, with a cryptocrystalline structure and no visible cleavage.

Identified August 15, 2026More mineral →

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At a glance

Common name: Blue-and-white polished stone, likely dyed howlite or turquoise imitation
Scientific name: Probably dyed magnesite/howlite (CaCO₃), but the image is insufficient for confirmation
Category: mineral
Identified: August 15, 2026
Method: Standard

AI Estimated Value

About $2–$15 as a common tumbled dyed 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- or carbonate-rich sedimentary environments; blue dye is commonly added after cutting or tumbling. Genuine turquoise forms by secondary alteration of copper-bearing rocks, generally in arid regions, over geologically recent hydrothermal-weathering stages.

Uses & applications

Commonly used for inexpensive beads, cabochons, carvings, and worry stones; turquoise is also used in jewelry and has higher value. Dyed substitutes have modest decorative value.

Geological facts

Strongly vivid, evenly distributed blue color and white spiderweb-like veining often indicate dyed howlite or magnesite rather than natural turquoise. A definitive identification requires hardness, density, magnification, and dye testing.

Field identification & locations

Common sources of dyed material include China and India; turquoise occurs in Arizona, Nevada, Iran, Tibet, and Mexico. Check for dye concentration in cracks, a relatively soft scratch response, and a white streak; avoid destructive tests on polished pieces.