Over the years J. Steele has worked with some of the best gems God's earth has to offer. He has now put this guide book together for all to use. This is a simple informative guide book. Buying colour gems is a challenge. Written for both consumers and professionals, it is easy to read, has colour photographs and gives practical pointers on how to decipher the differences. Whether you are interested in jade, opal, ruby, topaz, spinel, garnet, tourmaline or some other coloured gem, you will find this guide to be a fascinating and valuable resource.