At the same time, however, because they create the illusion of larger carat sizes, an invisible setting may actually be more affordable than a single large carat stone, bringing grandiose styles into the budget range of many more couples.
Market Expectations: Diamond prices can fluctuate widely, and good diamond buyers will understand the current market rates as well as emerging trends for different colored diamonds, a variety of carat sizes, and other gem characteristics.
The cost of diamond earrings can range from less than $100 to several thousand dollars, depending on the precious metal used, the total carat weight of the stones, the diamond quality of the stones, and the nature of the earring design.
The stones, averaging ten to a carat, are found in the river gravel or in alluvial deposits.
African mines the diamonds are not only crystals of various weights from fractions of a carat to 150 carats, but also occur as microscopic crystals disseminated through the blue ground.
Basing the calculation on the figures for the ten years 1896-1905, the average annual production is slightly over two and a half million carats, of the average annual value of £4,250,000, the average price per carat being £1: 13: 3.
One (English) carat =3.17 grains = gram.
In spite of this, however, the average yield in the profitable mines is only from 0.2 carat to o 6 carat per load of 1600 lb, or on an average about IIgrs.
In diamond weighing the grain = ± of the carat, = 7925 of the troy grain.
The annual output of diamonds from the De Beers mines was valued in 1906 at nearly £5,000,00o; the value per carat ranging from about 35s.