Precious stones

A field guide in colour to minerals, rocks and precious stones Bauer, Jaroslav 1974 A key to precious stones Spencer, Leonard James 1971 Crystal & gem Symes, R. F. 1991 Gem identification made easy Matlins, Antoinette Leonard 2013 Gem testing Anderson, B. W. 1971 Gemmological instrument Read, P.G. 1983 Gemmological instruments Read, P. G. 1983 Gemmological instruments Read, P. G. 1978 Gemology Hurlbut, Cornelius S. 1979 Gemstone enhancement: heat, irradiation, impregnation, Dyeing and... Nassau, Kurt 1984 Gemstones Hall, Cally 2000 Gemstones Smith, George Frederick Herbert 1972 Gemstones SMITH, HERBERT.G.F 1962 Gemstones Smith, George Frederick Herbert 1949 Gemstones in the Geological Museum Museum of Practical Geology (Great Britain) 1983 Gemstones of the world Schumann, Walter Year not listed India's mineral wealth Brown, J. Coggin 1955 Physical gemmology Walton, James 1952 Physical gemmology Walton, James 1952 Riches of the earth Anderson, Frank J 1981