Gold/Sterling Heart Pendant

This is a gold_sterling silver heart pendant with baguette stones. Stamped 925 SUN on the back. and acid tested. It is 10K gold over Sterling silver acid tested for both. SUN is a very known maker's mark. Stones are untested most likely CZ but could be diamond hard to know the back is open to let the stones breathe which is very common for diamonds, but again untested so unsure. Half dollar to help reference size of pendant. All stones are secure in their settings, may have patina on it, I only hand polish silver or gold items. Older items have heavy patina, and can polish upon buyers request. In great pre-owned condition. I have Sterling silver chains, not gold colored, but can add chain upon buyers request for a small additional cost. please ask any questions before purchasing.