A practical pocket-sized guide to the identification and use of precious and semiprecious stones, novelty stones, agates and crystals. It covers both the geolog... » 

A practical pocket-sized guide to the identification and use of precious and semiprecious stones, novelty stones, agates and crystals. It covers both the geology, chemistry and properties of gemstones, and the practical aspects for collectors, as well as including a visual identification key. «