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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Birthstone
June Birthstones — Modern, Traditional, and Where Zultanite Fits
The modern birthstones for June are pearl, alexandrite, and moonstone; traditional listings name pearl and alexandrite. June covers Gemini (until June 20) and Cancer (from June 21). Zultanite is not an official…
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Birthstone
July Birthstones — Modern, Traditional, and Where Zultanite Fits
The modern July birthstone(s) are ruby. The traditional July birthstone(s) are ruby, onyx. Zultanite (gem-quality color-change diaspore from Türkiye) is not an official July birthstone — the gem was discovered too late…
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Birthstone
August Birthstones — Modern, Traditional, and Where Zultanite Fits
The modern birthstones for August are peridot, spinel, and sardonyx; traditional listings name sardonyx and carnelian. August covers Leo (until August 22) and Virgo (from August 23). Zultanite is not an official…
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Birthstone
September Birthstones — Modern, Traditional, and Where Zultanite Fits
The modern birthstone for September is sapphire; traditional listings include sapphire and lapis lazuli. September covers Virgo (until September 22) and Libra (from September 23). Zultanite is not an official September birthstone…
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Birthstone
October Birthstones — Modern, Traditional, and Where Zultanite Fits
The modern birthstones for October are opal and tourmaline; traditional listings name opal and aquamarine. October covers Libra (until October 22) and Scorpio (from October 23). Zultanite is not an official October…
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Birthstone
November Birthstones — Modern, Traditional, and Where Zultanite Fits
The modern birthstones for November are topaz and citrine; traditional listings name topaz and pearl. November covers Scorpio (until November 21) and Sagittarius (from November 22). Zultanite is not an official November…
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Birthstone
December Birthstones — Modern, Traditional, and Where Zultanite Fits
The modern birthstones for December are tanzanite, turquoise, and zircon; traditional listings include turquoise and lapis lazuli. December covers Sagittarius (until December 21) and Capricorn (from December 22). Zultanite is not an…
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Specimen
7.25-Carat Zultanite — Faceted Oval, Strong Color Change
A 7.25-carat oval-faceted Zultanite specimen showing strong sage-green daylight to raspberry-pink candlelight color change. Cut from rough mined in the İlbir Mountains, Türkiye, in 2018 by a master cutter specializing in cleavage-aware…
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Specimen
3.10-Carat Zultanite — Cushion Cut, Champagne-Phase Visible
A 3.10-carat cushion-cut Zultanite specimen displaying the full three-illuminant range: sage-green under daylight, champagne-gold under indoor incandescent, and pinkish-orange under candlelight. Cut from rough recovered in 2020 from the İlbir Mountains source.…
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Education Article
How to Identify Zultanite — A Five-Step Field Guide
Identifying Zultanite (color-change diaspore) requires five tests: (1) check for color change between daylight and incandescent illuminants, (2) verify trichroic pleochroism with a dichroscope, (3) measure refractive index 1.682–1.752 with strong birefringence…