This is Open Heart by Tiffany & CoIt is a beautiful item with SA rank: Polished.
Brand name: Tiffany & Coiffany & Co.. & Co.
Model name: Open Heart
Size
Chain length: 40.5 cm (15.94 in) Pendant: Height 1.3 cm (0.51 in) x Width 1.5 cm (0.59 in): 3.3 g
Accessories
None
Material
18K

N: S: Unused items, exhibited items, and items that we judge to be similar.
SA: Clean item with almost no signs of use.
A: Item in good condition with little signs of use.
AB: Item with some signs of use, dirt, and scratches
B: Item with scratches, dirt, or signs of use
BC: Item with noticeable signs of use, dirt, or scratches
C: Item that is considered junk.