Quotes from some of the rave reviews of the 1997 gemological classic, Ruby & Sapphire, by Richard W. Hughes.

Emerald fissure filling with resins such as Opticon and oils such as cedarwood oil have generated tremendous controversy. What's all the fuss about?

An account of the authors' 1997 visit to Burma's jade mines.

The history of Burma's jade mines, as seen through Western eyes, from the earliest accounts through World War II.

This 1997 classic set a new standard for gemological scholarship. Now out-of-print, it sells for a thousand dollars or more in the secondhand market. Its successor is 2017's Ruby & Sapphire: A Gemologist's Guide.

Part 1 of Chapter 10  from Richard Hughes' 1997 book, Ruby & Sapphire. It covers general principles of judging quality.

Appendix B from Richard Hughes' 1997 book, Ruby & Sapphire, consisting of prices.