Yellow Diamond 925 Pendant w/925 Rope Chain

Gorgeous sterling silver pendant holds five yellow brilliant, cut diamonds, along with seven tiny white, brilliant cut diamonds. I don’t know the exact carat weight. There is an 18 inch sterling silver rope chain as well. I have tested the silver, and I have tested the diamonds with the Presidium 2 gem tester. I believe this necklace to be vintage because of the spring ring clasp.