6.30-Carat Zultanite — Cushion Cut, Exceptional Color Change

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Specimen

6.30-Carat Zultanite — Cushion Cut, Exceptional Color Change

Zultanite
Fact-checked 2026-04-27

By Dr. Ömer Aksoy Mining Geology & Provenance Editor

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 lapidary on diaspore. Approximate dimensions 11 × 11 × 7 mm.

Provenance

This specimen was cut from rough mined in the İlbir Mountains of southwestern Türkiye — the only currently producing locality for gem-quality color-change diaspore. The rough was cut by a master cutter trained to orient the table facet to minimize cleavage exposure on the {010} plane.

Optical performance

Exceptional — fullest possible sage-to-raspberry transition, museum-grade.

Physical specification

Weight: 6.30 carats. Dimensions: 11 × 11 × 7 mm. Cut: Cushion brilliant. Cut year: 2016. Locality: İlbir Mountains, Muğla Province, Türkiye.

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