wholesale diamonds were discovered to be carbon in 1796, and it took more than 150 years from that time until a method of diamond stud earrings synthesis was invented.
The depression of the 1930s hit the diamond stud trade hard. The cutting shops were sometimes shut down completely for several weeks at a time. The situation remained difficult until the outbreak of the Second World War.
Because fancy shaped diamond necklace is not symmetrical like a round diamond stud earrings, a broader range of parameters are needed in regards to proportion.