Scientific reports
Forensic gemmological investigation based on optical and crystal-chemical changes in topaz from Ouro Preto and Caraí, Brazil, induced by heat treatment.
Jana Fridrichová, Peter Bačík, Olena Rybnikova, Ján Štubňa, Daniel Furka, Samuel Furka, Jan Cempírek, Radek Škoda, Tomáš Vaculovič
Published: 202510.1038/s41598-025-33599-y
Abstract
Topaz is frequently subjected to heat treatment and irradiation to enhance colour, particularly to produce the market's most preferred salmon pink and sky blue varieties. However, an insufficient description of these processes can lead to fraudulent…
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