00270nam a2200109 a 450000500170000002000150001708200170003210000160004924500340006526000440009930000170014320251203110119.0  a0751310271  a553.8,HALb_  aHall, Cally  aEyewitness handbook Gemstones  aLoNew DelhionbDorling Kindersleyc1994  a1996p.c20cm