Front:
Gem
Vinerals
P
Back:
GEM MINERALS
DIAMOND, center of group; South Africa. From left in
curve around diamond are EMERALD, Colombia; CAT'S
EYE, Brazil; SAPPHIRE, Ceylon; an uncut sapphire cry-
stal; and lower right RUBY, Burma. In background, Beryl:
EMERALD crystals in the rough from Chivor Mines,
Colombia.
Diamond courtesy of Walter C. Blatt, St. Louis. Other
cut stones courtesy of Blatt and Wm. V. Schmidt, New
York. Emerald crystals and uncut sapphire courtesy Earth
Science Dept. of Washington University.
628 East 20th St.,
NATURE PRESS
Alton, Illinois, or authorized agents. E3242
Sold only by
S-5613213
HERE
