AI identification & appraisal estimate

Polished turquoise gemstone slab

Submitted photo of Polished turquoise gemstone slab
Photo submitted by the user — not generated by AI

User's notes

23grams

These notes were written by the person who submitted this item. Appraiser.AI has not verified them, and the AI's identification and estimate may rely on them.

AI Estimated Value

Not an official valuation

$45-75

AI estimate as of September 27, 2026 · verify with a professional before acting

AI-Generated · Verify before acting

Everything on this page is generated by AI for informational purposes only. AI can make mistakes — the AI may misidentify items or misattribute them (artist, maker, brand, designer, origin, era). This is not an official valuation and should not be used for insurance, sale, tax, estate, legal, or lending purposes — or any decision requiring a certified appraisal. It is not an authoritative claim about any person, brand, or rights holder — do not share or rely on it as a factual statement about a third party. Always consult qualified professionals before making financial decisions.

This analysis also relies on unverified notes provided by the user, which may be incomplete or inaccurate and could affect the result.

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AI Item Analysis

This item is a polished, irregularly shaped slab of opaque gemstone material, appearing visually consistent with turquoise or a similarly colored hydrated phosphate of copper and aluminium. The stone features a vibrant robins-egg blue to aqua coloration with interspersed lighter matrix webbing, white chalky inclusions, and naturally occurring porous depressions or vugs across its top surface. The edges and surface display a smooth, somewhat waxy polish characteristic of lapidary cabochon-making or specimen preparation, while natural host rock matrix remains visible in recessed crevices and along the borders. There are no legible hallmarks, maker's marks, or inscriptions visible on the specimen. The owner provides unverified context indicating a weight of 23grams. Due to the limitations of visual-only photographic assessment, the exact mineralogical composition and geographic origin remain unauthenticated. The item displays physical characteristics common to decorative mineral specimens or lapidary rough material intended for jewelry making or collection.

AI Appraisal Report

Based on the provided photographs, I have examined this polished, irregularly shaped stone. Per user submission, the item is weighed at 23 grams and visually presents characteristics consistent with turquoise or a similarly colored hydrated phosphate of copper and aluminium. Based on what I can see, the specimen displays a vibrant robins-egg blue to aqua coloration, lighter matrix webbing, white chalky inclusions, and naturally occurring porous depressions, alongside a smooth, waxy lapidary polish. However, I cannot verify mineralogical composition, geographic origin, or treatment status from a photograph alone. The valuation range of $45–75 assumes that the working hypothesis of natural turquoise is correct and accounts for the reported 23-gram weight and polished cabochon-rough form suited for lapidary or jewelry use. General market demand for small decorative mineral specimens and lapidary rough of this type remains steady among hobbyists and artisans, though prices vary widely based on exact provenance, hardness, and treatment level (such as stabilization or enhancement). To confirm the identity, quality, and potential treatment of the stone, physical inspection would be required, potentially including scientific testing such as refractometry, specific gravity testing, or spectroscopic analysis. If further examination were to reveal that the specimen is a synthetic imitation, a heavily stabilized simulant, or a different mineral entirely, the market value would likely decrease significantly to the $10–25 range typical of decorative novelty stones.

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