"Zultanite" – diaspore with the color-change effect
| Yu. Gayevsky State Gemmological Centre of Ukraine |
| О. Belichenko State Gemmological Centre of Ukraine |
| N. Vovk Internet shop: nvovkjewerly.com.ua |
| Language: Ukrainian |
| Precious and Decorative Stones. No. 4 (114), 2023: 9–15 |
| Abstract The information is presented on a unique variety of transparent diaspore with a color-change effect, which is known in the global gemstone market under the trade names Zultanite (Zultanite®) and Csarite (Csarite™). The results of gemological studies of diaspore specimens with the effect of color change and its imitation are presented. Gemological characteristics were determined, microscopic examination, quantitative X-ray fluorescence analysis (EXDRF) and IR-Fourier spectroscopy were carried out. |
| Keywords: diaspore, zultanite, csarite, diagnostic characteristics, gemological expertise. |
| References |
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1. Hatipoglu M., Akgun M. Zultanite, or colour-change diaspore from the Milas (Mugla) Region, Turkey. Australian Gemmologist. 2009. Vol. 23. P. 558–562.
2. Hatipoglu M. Gem-Quality Diaspore Crystals as an Important Element of the Geoheritage of Turkey. Geoheritage. 2010. № 2. Р. 1–13. 3. Hatipoglu M. Gem-quality transparent diaspore (zultanite) in bauxite deposits of the Ilbir Mountains, Menderes Massif, SW Turkey. Mineralium Deposita. 2010. Vol. 45. No. 2. P. 201–205. 4. Diaspore. URL: https://www.mindat.org/min-1285.html (date of access: 28.08.2023). 5. Zultanite®. URL: https://zultanite.com (date of access: 28.08.2023). 6. Zultanite. URL: https:zultanite.org (date of access: 28.08.2023). 7. CSARITE®. URL: https://www.csarite.com (date of access: 28.08.2023). 8. AGTA. URL: https://agta.org (date of access: 28.08.2023). 9. Tsuchida T. Hydrothermal synthesis and characterization of diaspore, β-Al2O3·H2O. URL: https://link.springer.com/article/10.1007/BF00581103 (date of access: 28.08.2023). 10. N.VOVK.jewelry. URL: nvovkjewelry.com.ua (date of access: 28.08.2023). 11. Ye M, Shen AH, Wei P. Gemmological and Spectral Characteristic of Zultanite: Colour-Change Diaspore. Gems & Gemmology. 2016. Vol. 18, No. 5, P. 34–39. 12. Xiaoyan Yu, Bijun Guo, Xue Jiang, Weirui Kang. Color-Change Glass as a Zultanite Imitation. Gems & Gemology. 2016. Vol. 52. No. 4. P. 434–436. |