A Near-Colourless HPHT-grown Diamond with Natural-appearing Blue Fluorescence from N3 Centres.

This document is a journal article titled "A Near-Colourless HPHT-grown Diamond with Natural-appearing Blue Fluorescence from N3 Centres." The article discusses the discovery of a near-colorless synthetic diamond with blue fluorescence that closely resembles the fluorescence of natural diamonds. The diamond was grown using a high-temperature, high-pressure (HPHT) process and exhibited characteristics typically associated with boron-doped HPHT-grown diamonds. However, further analysis revealed that the blue fluorescence was due to the presence of N3 centers, which are typically found in natural diamonds. The article concludes that while near-colorless synthetic diamonds with blue fluorescence can pose an identification challenge, a combined approach including observations of growth zoning and photoluminescence spectroscopy can positively identify them. [Extracted from the article]