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Ch. 5: Gem History Properties

Ch. 5: Gem History Properties Page of 515 Ch. 5: Gem History Properties Text size:minus plus Restore normal size   Mail page  Print this page
178
A POPULAR TREATISE ON GEMS.
Opal.
Aquamarine.
.Hyacinth. The above mixture, with the addition often grains of the oxide of manganese.
Garnet.
Rubellite, Med Tourmaline.
Jndigolite, or Slue Tourmaline. The above mixture, with the addition of the carbonate of cobalt.
Chrysolite.
Amethyst.
But 1 grain of the oxide of manganese to each ounce of the mass.
Ch. 5: Gem History Properties Page of 515 Ch. 5: Gem History Properties
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