Amazing Princess-cut Invisible Setting Pink Sapphire and Diamond Pendant, 18K White Gold.
It comes with 18 inches, 14K White Gold Chain, with Lobster Claw Lock.

Total Pink Sapphire Weight: 3.95 Ct.
Diamond Weight: 0.25 Ct,
Clarity: H-SI1.
Item Weight: 6.3 g.
Pendant Width: 8.5 mm
Pendant Height: 16 mm.