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Show Cast of Producing a Diamond. To produce a diamond in the rough costs approximately $7 a karat, according ac-cording to estimates of various students stu-dents of the diamond industry. If this diamond properly cut were sold at $30, it would net a good profit. In the South African mines it is said the diamonds are distributed so evenly that 100 tons of the bluish clay yields about 100 karats of diamonds. The production cost of a five-karat diamond dia-mond is S35. If it is flawless and of good water it will easily net $3. .000. The supply of diamonds is unlimited. Almost all of the world's supply comes i'rom South Africa and complete control con-trol of it is in the hands of one British Brit-ish concern. |