Ch. 3: Precious Gem stones in 1920

Ch. 2: Platinum in 1920 Page of 57 Ch. 3: Precious Gem stones in 1920 Text size:minus plus Restore normal size   Mail page  Print this page
GEMS AND PRECIOUS STONES.
By B. H. Stoddard.
Ch. 2: Platinum in 1920 Page of 57 Ch. 3: Precious Gem stones in 1920
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US Geol. Surv. 1920. Gemstones, Metals.
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