Gem testing /
Anderson, B. W. (Basil William), 1901-
Gem testing / B. W. Anderson ; revised by E. A. Jobbins. - 10th ed. - London : Butterworths, 1990. - x, 390 p. : ill. (some col.) ; 24 cm.
Includes index.
0408060069 (hbk.) / Hadiah
Precious stones--Identification.
Precious stones--Testing.
Gem testing / B. W. Anderson ; revised by E. A. Jobbins. - 10th ed. - London : Butterworths, 1990. - x, 390 p. : ill. (some col.) ; 24 cm.
Includes index.
0408060069 (hbk.) / Hadiah
Precious stones--Identification.
Precious stones--Testing.