A handy guide identifying over 170 types of the world's gemstones with beautiful colour photography taken from the Smithsonian Institution's archives.'Gem Gemstones' is an indispensable guide for amateurs and enthusiasts alike. This pocket-sized book explores the fascinating history of ornamental stones, discussing their different social and cultural meanings and monetary values through the ages.Each page features specific details about the crystal system, hardness, composition, lustre and gemstone 'family' of each gem.Full colour photography for each specimen with cut and uncut examples from the Smithsonian Institution's archives are included throughout, as well as up-to-date information on where to go to view such gems.Simple illustrations show the crystal structure of each stone for ease of identification and a complete glossary and bibliography show where to go for further information.