1886
Probably within the last 30-40 years, since they are inscribed by lasers. Initial documentation about using lasers in the diamond industry is dated in the early 1980s.
No, but a diamond is.
Diamond.
You have spelled it correctly: diamond.
One carat is equivalent to 100 cents in diamonds. Carat is a unit of weight used to measure diamonds and other gemstones, with one carat equal to 200 milligrams. The term "cent" is commonly used in the diamond industry to refer to a hundredth of a carat. Therefore, 1 carat is equal to 100 cents in diamonds.
Debeers
DeBeers are the diamond people in South Africa, they mine and they also broker, in one word they have the monopoly on the diamond industry, they are world famous, when you say "DeBeers" you know you mean diamonds.
DeBeers controls about 35% of the diamond gemstone industry, according to Time Magazine, November 2010.
The DeBeers diamond empire began in 1837 with the discovery of a Diamond mine in Africa. The DeBeers popularized the use of diamonds as a stone signifying commitment..
This slogan began with DeBeers in the 1930s.
Probably the DeBeers organization.
It makes money for the Debeers family.
Wholesale and to the trade, the largest supplier is probably DeBeers.
Major? I believe it was DeBeers...after they consolidated the independent mining concerns and cornered the market.
The largest collection is probably in the hands of the DeBeers diamond organization.
The diamond company monopoly can limit competition, control prices, and restrict supply in the global diamond industry and market. This can lead to higher prices for consumers and less innovation in the industry.
Cecil Rhodes, an Englishman, formed the DeBeers diamond organization. According to Wikipedia, as below, his partner was C.D. Rudd. The name DeBeers was the family name of the farm they purchased that contained the volcanic pipe. You can read more about Rhodes, below.