The Ruby & Sapphire Buying Guide - How To Spot Value & RipoffsYou don't have to be a jeweler or gemologist to tell a ruby from red glass or a good sapphire from a bad one. The Ruby and Sapphire Buying Guide will show you how. It's easy to read, has lots of photos, and gives clear, step by step pointers on how to buy the best stones for the money. This is the only book to offer detailed guidelines and pictures on judging ruby and sapphire quality.