World-renowned gemmologist Richard W. Hughes is one of the world’s leading authorities on ruby and sapphire, authoring the definitive resources on these gems.
Over the years, he has written over 170 articles and several books on coloured gemstones. Published in 2017, his Ruby & Sapphire: A Gemologist’s Guide has been described as the most comprehensive book on a single gem species. It was the culmination of nearly four decades of work in gemmology. The book, written with his wife Wimon Manorotkul and his daughter E. Billie Hughes, built on his earlier work, Ruby & Sapphire, which was published in 1997. Hughes’ latest book, Jade, A Gemologist’s Guide, came out in 2022.