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Ch. 2: Diamonds

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DIAMONDS AND PEARLS.              35
posing rough diamonds to be valued at two pounds per carat.
The weight of such a stone must be dou­bled (on account of half being supposed to be lost in working it) which is considered as its original weight, making two carats ; then multiply that weight into itself, which squares it, and makes four ; lastly, multiply the four by two, that produces eight pounds, which is the value of a stone of one carat, wrought or polished, and is equal to the va­lue of the rough diamond of two carats, out of which it is supposed to be made. This single instance is here given to show the va­lue of rough diamonds in the price of wrought ones; and as a farther explanation of the rule of valuing them, and previous to the offering any other, it is to be observed, that although two pounds is laid down as the general price of rough diamonds, it is nevertheless to be understood, that rough diamonds differ in their value, according to their different degrees of perfection or im­perfection, and according to the loss of weight they may be supposed to sustain in being truly wrought; as it is well known,
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