Jennifer Lopez Wears 50-Carat, $2.1 Million Yellow Diamond on American Idol

Jennifer Lopez onstage at "American Idol" Season 11 Top 8 Live Performance Show on April 4, 2012. Credit: Getty

It may not be a diamond engagement ring from Casper Smart, but Jennifer Lopez's latest sparkler is truly impressive!

On American Idol Wednesday night, the star judge flashed Cora's fancy yellow radiant diamond ring set in 18k yellow gold.

The giant jewel, which has a center stone weight of 50.40 carats (giving Kim Kardashian's 20.5-carat engagement bauble from Kris Humphries a run for its money) and retails for a whopping $2,124,780!

For AI's "Top 8 Performance Show," Lopez, 42, also accessorized with layered necklaces, two cuff bracelets and more rings on her left wrist and hand. She wore her hair in sexy beachy waves and wore a silver and white dress with a thigh-high slit.