10 Carat Diamond Tennis Bracelet Circa. 1980 American. Set in 18K yellow gold. Works wonderfully with a yellow gold watch. This extraordinary tennis bracelet has wonderful E and F color diamonds, VS2 in clarity. 40 diamonds, all tested with a diamond tester. Each diamond is .25 carats in weight. Gold tested with 18K acid. Marked 18K on the clasp, which works perfectly and has a safety bar. The bracelet is in absolutely pristine condition. 7 inches long 1/8 inch wide. 17.6 gr. 11.3 dwt.