Research

Natural Bluish Green rough diamond

Natural Bluish Green rough diamond. Luckily with lots of radiation stains. Very difficult to judge from spectra alone ! If polished, color origin will often be undisclosed.

FTIR shows type IaAB (with H1a radiation damage), UV-Vis-NIR confirms this with 415 nm. Also clearly visible the radiation damage GR1 at 741nm.
ALGT

Independent gemological laboratory providing trusted certification from the heart of Antwerp's diamond district since 2019.

Contact

🇧🇪 Antwerp
Hoveniersstraat 30, 2018 Antwerp
info@algtlabs.com
+32 3 233 25 08
🇨🇳 Shanghai
Room 1201, Ocean Building, 550 East Yan'an Road, Huangpu District, Shanghai
labshanghai@algtlabs.com
(021) 60704858
WeChat: ALGTSHANGHAI

© 2026 ALGT — Antwerp Laboratory for Gemstone Testing. All rights reserved.