The reality star presented her with a 2-carat diamond on a yellow gold ... who presented her with an emerald-cut diamond engagement ring by Neil Lane featuring twisted detail on the sides.

J.Lo's enormous emerald-cut "rare" engagement ... photo of the sparkling ring on the superstar’s finger, giving fans a close-up view of the mega-carat emerald-cut diamond. Though the couple ...

While official confirmation of this highly anticipated engagement has yet to break ... Set on a platinum band, the ring featured a 16.5-carat emerald cut diamond flanked by two 2-carat trapezoid cut ...