This is Cartier's Love Ring. It is a beautiful item with SA rank: Polished.
Brand name: Cartier
Model name: Love Ring
Size
Size: US 4.75 / EU 49 / JP 9
Depth: 0.4 cm (0.16 in)
Ring Inner Diameter: 1.5 cm (0.59 in): 4.3 g
Accessories: None
Material: 750 cm (295.28 in)

Condition Guide:
S: Like new by the store's standards
SA: Almost unused, overall pristine
A: Excellent condition
AB: Great condition, minor signs of use
B: Good condition, signs of wear from normal use
C: Noticeable scratches, dirt, or signs of use
D: Heavily damaged or in need of repair
Item with difficulty being called C: