Gemstone
Zultanite
Zultanite is gem-quality color-change diaspore (α-AlO(OH)) mined exclusively from the İlbir Mountains of southwestern Türkiye. Suggested-retail prices range from USD 750 per carat for stones under one carat to USD 14,000+ per carat for stones above 20 carats — an order of magnitude less expensive than alexandrite while offering a comparable three-illuminant color shift between sage-green, champagne-gold, and raspberry-pink. This hub indexes every Zultpedia entry on the gem: how to identify it, how much it is worth, where authorized sellers are, how to verify a lab report, and how to care for the jewelry.
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Specimen
4.50-Carat Zultanite — Oval Brilliant, Strong Color Change
A 4.50-carat Oval brilliant Zultanite specimen with Strong — clean shift with no muddy intermediate, exceptional clarity. Cut from rough mined in the İlbir Mountains, Türkiye, in 2017 by a master cutter…
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Specimen
0.78-Carat Zultanite — Round Brilliant, Moderate Color Change
A 0.78-carat Round brilliant Zultanite specimen with Moderate — color shift visible but partial, suitable for accent stone. Cut from rough mined in the İlbir Mountains, Türkiye, in 2022 by a master…
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Specimen
6.30-Carat Zultanite — Cushion Cut, Exceptional Color Change
A 6.30-carat Cushion brilliant Zultanite specimen with Exceptional — fullest possible sage-to-raspberry transition, museum-grade. Cut from rough mined in the İlbir Mountains, Türkiye, in 2016 by a master cutter specializing in cleavage-aware…
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Specimen
1.95-Carat Zultanite — Marquise Cut, Strong Color Change
A 1.95-carat Marquise brilliant Zultanite specimen with Strong — table-up viewing optimal, pleochroic axes well-managed by cutter. Cut from rough mined in the İlbir Mountains, Türkiye, in 2020 by a master cutter…
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Gem Article
How Zultpedia Resolves Conflicting Sources on Zultanite
Where two reputable sources disagree on a value or claim, Zultpedia presents both with attribution and source-tier marking, rather than picking one. Example: Wikipedia gives diaspore's specific gravity as 3.1–3.4; Zultanite Gems…
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Gem Article
Zultpedia Source Hierarchy for Zultanite Entries
Zultpedia operates a three-tier source hierarchy. Tier I: primary mineralogy and major gemological authorities (Mindat, GIA, IGS, Mineralogical Society of America, Wikipedia for peer-reviewed mineral pages). Tier II: peer-reviewed papers and recognized…
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Gem Article
Zultanite Fact-Check Cadence and Drift Management
Every entry in the Zultpedia archive on Zultanite (color-change diaspore) is reviewed at minimum annually for fact-check drift. Property values, citations, and per-carat figures are spot-checked quarterly against the original sources. The…
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Specimen
1.25-Carat Zultanite — Pear Cut, Strong Color Change
A 1.25-carat Pear brilliant Zultanite specimen with Strong — full sage-green to raspberry shift, minimal gold transition. Cut from rough mined in the İlbir Mountains, Türkiye, in 2019 by a master cutter…
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Specimen
2.08-Carat Zultanite — Emerald Cut, Moderate Color Change
A 2.08-carat Emerald (step) cut Zultanite specimen with Moderate — visible three-illuminant range with champagne-gold mid-phase. Cut from rough mined in the İlbir Mountains, Türkiye, in 2021 by a master cutter specializing…
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Glossary Term
Metamorphism
The process by which existing rock is transformed by heat, pressure, or chemically active fluids without melting. The İlbir Mountains diaspore deposit formed from regional metamorphism of bauxite-rich sediments under conditions favoring…