Credit: Sara De Boer/

Kat Von D may have been keeping her engagement to Jesse James, 41, under wraps in L.A. Wednesday night, but she wasn't shy about flashing her new sparkler!

The L.A. Ink star, 28, debuted the four-carat-plus platinum and diamond ring at the 16th Annual Los Angeles Art Show Opening Night Premiere Party.

The bauble, which comes from the Neil Lane archival collection, has a center diamond surrounded by smaller diamonds and a delicate filigree pattern with pretty scroll work.

"She absolutely loved her ring," Neil Lane tells

And while she didn't open up about the ring's significance at the event -- "How do you know we aren't already married," she joked -- she was willing to gush about the man behind the bling.

"I feel really lucky," she told Us of her motorcycle mogul beau of about six months. "I think in the past I thought I knew what love was. I think I am growing up a lot too and realizing the truth in a lot of things and feel really blessed now."