Color-change sapphire is routinely heat-treated to enhance color and clarity; color-change garnet is occasionally heat-treated. Synthetic color-change sapphire is widely produced. Diaspore stands apart: gem-quality color-change diaspore is sold untreated because no commercially viable treatment exists for the specific optical signature, and no commercial synthetic exists. Buyers should expect "no treatment" disclosure on any genuine Zultanite lab report.

The verified facts

This entry is part of the Zultpedia editorial archive on color-change diaspore from the İlbir Mountains of southwestern Türkiye. The specific claims above are documented in the cited primary sources and cross-referenced with the related property guides and laboratory standards.

Editorial framing

Zultpedia treats color-change diaspore as a single-source mineral species first and a trade-name commodity second. Editorial standards, source hierarchy, and corrections process are documented on the methodology page.

Cross-references

See also the related entries listed beneath this article and the property guides for verified physical and optical values.