PHOTO: www.instagram.com/taylorkinney11

The couple celebrated their engagement with an intimate dinner with family and friends at Gaga’s family restaurant, Joanne Trattoria, after 33-year-old Taylor Kinney proposed on the most romantic day of the year.

Speculation is rife as to the jeweller behind Gaga’s heart-shaped diamond ring, but when interviewed, celeb jeweller Shari Fabrikant of Robert Fabrikant Inc told HollywoodLife.com that the ring looks to measure around 8-carat, and is said to be worth a cool US$500,000.

Seeking something equally romantic? Look to these jewelers for ideas.