Themelis, Ted
The Heat treatment of Ruby and Sapphire - Gemlab Inc. 1992 - xviii, 236p. : ill.(some col.)
0940965100
RUBY-HEAT TREATMENT
HEAT TREATMENT
SAPPHIRE-HEAT TREATMENT
GEMS
GEMS-HEAT TREATMENT
549.517.13 / T4
The Heat treatment of Ruby and Sapphire - Gemlab Inc. 1992 - xviii, 236p. : ill.(some col.)
0940965100
RUBY-HEAT TREATMENT
HEAT TREATMENT
SAPPHIRE-HEAT TREATMENT
GEMS
GEMS-HEAT TREATMENT
549.517.13 / T4