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58            PRECIOUS STONES
eighth to three-sixteenths more, and will not be as brilliant as the spread stone. This would be the comparative cost of the two stones of the same size and material if the thick stone were sold for five per cent, less:
One brilliant, one carat, at $100 per carat.. $100. 00 for the stone. One brilliant, one and one-eighth carat, at $95 per carat....................... 106.88 for the stone.
In other words, the dealer pays six dollars and eighty-eight cents more for a poorer stone of the same size as the higher price goods, because it weighs more.
On the other hand, there are stones of all kinds worth much more than any prices quoted here. Gems of rare and exceptional qualities cannot be rated.