tava) ; thirty-two vintenes are equal to seventy grains (graos) ; one carat is equal to four grains.
price of diamonds is determined in trade by examining accurately their
character as above stated, and then the price is fixed ; the weight of
the diamond is at first multiplied by itself, and the sum obtained
multiplied again by the price of one carat. A brilliant, for instance,
-would weigh two carats, and on examining its properties, if good, its
price would be found to be forty-four francs. We proceed in the
following manner to get at the full value of the diamond: 2 x 2 x 44 =
176 francs. We do not always, however, arrive at the correct result.
If the brilliants are very large, and exceed the weight of eight or ten
carats, it is difficult to arrive at a standard. I will endeavor to
give below a table of the prices of the diamond in Holland, France,
England, Germany, and the United States, as far as ascertained, and as
near to the actual price current as I could obtain.
diamonds fit for cutting are worth ten or twelve francs per carat ; any
diamond exceeding the weight of one carat is estimated by the square of
its weight multiplied by eleven or twelve francs as the average price.
of three grains are in much demand, and are worth fifty francs per
carat. Those of three carats, used for centre-pieces in necklaces, are
sometimes worth four hundred francs. Rose-diamonds for mounting, and