Jewelry designer Lorraine Schwartz is known for her flawless stones. So it's no surprise that when A-listers pop the question, Schwartz is their go-to jeweler. Thanks to Kim Kardashian’s 15-carat stunner, the public was again reminded of the one of-a- kind jewels the designer dishes out. Monday night, Kanye West proposed to his girlfriend and mother of his child in front of friends and family at AT&T Park in San Francisco. The singer decided to pop the question on Kardashian’s 33rd birthday.

Other noted stars who have turned to Schwartz for engagement rings include West’s friend Jay-Z. The rapper proposed to his Queen B, Beyoncé, with a flawless 18-carat diamond, outdoing West by a mere 3 carats. Beyoncé’s stone is estimated to be worth around $5 million. In 2012, Blake Lively got proposed to by boyfriend Ryan Reynolds with a $2 million Lorraine Schwartz pink diamond.

The star-studded engagements don’t stop there. Jerry O’Connell proposed to Rebecca Romijn in 2005 with a 6-carat canary yellow diamond set by Schwartz. Heidi Klum got proposed to by now ex-husband Seal with a 10-carat canary yellow diamond from Schwartz. Molly Sims’ engagement ring is also by the designer. Her husband, Scott Stuber, helped design the ring, which has a cushion-cut center stone.

Ironically enough, Kim Kardashian's now ex-husband Kris Humphries outdid Kanye West. When he proposed, he chose to go with a 16.2 engagement ring from Schwartz as well — great minds think alike. Although Kardashian and Humphries didn’t last very long, here's hoping the ring brings better luck to Kardashian and West.