mineral

Variscite or turquoise-like silica stone

Likely variscite (hydrous aluminum phosphate, AlPO₄·2H₂O), possibly chrysoprase/opalized chalcedony

AI-generated identification · may be incorrect

Pale blue-green, opaque, with brown iron-oxide matrix and a waxy to dull luster; hardness about 3.5–6.5 depending on species. The irregular massive texture shows no visible crystal faces or cleavage.

Identified August 24, 2026More mineral →

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At a glance

Common name: Variscite or turquoise-like silica stone
Scientific name: Likely variscite (hydrous aluminum phosphate, AlPO₄·2H₂O), possibly chrysoprase/opalized chalcedony
Category: mineral
Identified: August 24, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 for a small common polished specimen; $30–$150+ if it proves to be attractive, natural high-grade variscite or 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

Likely formed by low-temperature groundwater alteration in aluminous, phosphate-rich rocks; iron oxides create the brown webbing. Variscite deposits are generally Cenozoic to younger, though exact age cannot be determined from the image.

Uses & applications

Used mainly for cabochons, carvings, jewelry, and mineral collecting; the specimen appears cut or naturally shaped and polished. It is not normally used as a construction material.

Geological facts

The blue-green color and rusty matrix resemble turquoise, variscite, or “variscite turquoise,” but visual identification alone is insufficient. A refractive-index, specific-gravity, hardness, or laboratory test is needed for a definitive name.

Field identification & locations

Common sources include Nevada and Utah for variscite/turquoise-like material, and Australia for chrysoprase. Avoid prolonged soaking, acids, ultrasonic cleaners, and heat; test inconspicuously because these minerals can scratch or stain.