925 Sterling Silver 17” Chain Necklace w/ Heart Shaped Pendant w/ CZ

925 Sterling Silver 17” Chain Necklace w/ Heart Shaped Pendant w/ Cubic Zirconia. Cuban link chain. Spring ring clasp marked “925” on the clasp as well as the ring next to it. The pendant is about 3/4 an inch by a little over 1/2 and is marked “925 CZ”. I’ve tested the metals to verify they are sterling silver. Also, with the aid of a Presidium gem tester, the clear stones register as high glass. Which is where cubic zirconia are supposed to test. In excellent condition.