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Ch. 6: Sapphire

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A POPULAR TREATISE ON GEMS.
In order to show the various prices of rubies, we cite the sale at auction of the Marquis de Drée's collection, at Paris
There are numerous faults and defects to which sapphire are subject, and which always influence their price, such as clouds, milky or semi-transparent specks, like chalcedony,
Ch. 6: Sapphire Page of 515 Ch. 6: Sapphire
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