Diamonds and
pearls being, of all jewels, of the greatest importance to this and
most nations of the world, justly demand the highest regard of any;
inasmuch as they constitute the largest share of wealth of this kind,
and are the chief ornaments of great and distinguished personages: more
especially diamonds, as being the most beautiful and valuable of all.
On which account, as 1 have been above thirty years a considerable
trader in them, and a manufacturer of diamonds, I have studiously
employed great part of my time in search of rules to ascertain the
value of
