Gem testing /
Anderson, B. W. 1901-
Gem testing / B.W. Anderson. - 9th ed. - London : Butterworth Scientific, 1980. - (432) p. ; 22 cm.
0408004401
Precious stones--Identification.
Precious stones--Testing.
Gem testing / B.W. Anderson. - 9th ed. - London : Butterworth Scientific, 1980. - (432) p. ; 22 cm.
0408004401
Precious stones--Identification.
Precious stones--Testing.
