given
for valuing them in proportion to their size and weight, which will be
found hereafter exhibited; and if the use and application of them
were conformable to the production of nature, the rules thus founded
and prescribed, would never be interrupted : and, therefore, if the
humour of the world demands, at any time, more or less of any
particular sizes and weights than nature provides, the price obtruded
thereby must be reckoned the occasional, and not the just price, and
complied with as such; which happens to be the case at present, by the
extraordinary use of small diamonds in the decorations now fashionable
in jewelling. And as the price of these small diamonds will always
fluctuate by the alterations of fashions, little regard will be had in
this treatise to any, under the weight of one carat.
It
may be also observed, that the value of rough diamonds, from two to
three carats, and also of polished diamonds, from one to one and a
half, does not correspond with the rules hereafter laid down ; the
price at present being lower than what is asserted by