The history of the Black Prince's Ruby, one of the world's most famous precious stones.

The Book of Ruby and Sapphire J.F. Halford-Watkins  |  2012 Prior to the 1930s, ruby and sapphire were mysteries, arcane gems oft-confused with spin...

The Opticon treatment of fissure-filling treatment emeralds with Opticon became an issue of huge controversy in the late 1990's. This article takes a ...

An exploration of the history and lore of the Emerald Buddha, a green statue that resides in Bangkok, Thailand’s Wat Phra Kaeo and watches over Thailand.

A brief history of the heat treatment of ruby & sapphire, from ancient times to the modern era.

The use of Fourier-Transform Infrared Spectroscopy (FTIR) in gem identification, with examples of sapphire & jadeite.

In a tragic underground cave in, Mike Roberts of the Roberts Yogo Sapphire Mine passed away in March 2012.

A discussion of the definition of padparadscha sapphire, from early to modern times, along with the difficulty in standardizing such definitions.

The chapter on ruby and sapphire from Burma (Myanmar) from Richard Hughes' 1997 book, Ruby & Sapphire.

Full reviews of the 1997 gemological classic, Ruby & Sapphire, by Richard W. Hughes.

Inclusions are among the most important features for identifying ruby and sapphire. This is the chapter on ruby and sapphire inclusions from Richard Hughes' 1997 book, Ruby & Sapphire.

This is the chapter on ruby and sapphire from India (including Kashmir sapphire) from Richard Hughes' 1997 book, Ruby & Sapphire.

Ruby & Sapphire  •  A Collector's Guide Richard W. Hughes  |  2014 Few gems capture the imagination like ruby and sapphire. This book removes th...

Ruby & Sapphire  •  A Gemologist's Guide Richard W. Hughes, with Wimon Manorotkul & E. Billie Hughes  |  2017 Designed as a companion to Rub...

An examination of the problem of separating pink sapphire and padparadscha from ruby.

A history of spinel, including balas ruby and lodestone.

Digital Devil #10. It was Tucson. Show over. The last supper. One of those marvelous evenings which Tucson regularly delivers…