Jesse James and Kat Von DKat Von D's surprise engagement to Jesse James was announced yesterday, and Us Weekly has the details on the ring.

Us Weekly reports that the ring is a 4-carat-plus platinum and diamond piece from Neil Lane's archival collection. It has a center diamond surrounded by smaller diamonds and a delicate filigree pattern with pretty scroll work.

Neil Lane is quoted saying, "She [Kat] absolutely loved her ring."

Von D wore the engagement ring to the 16th Annual Los Angeles Art Show Opening Night Premiere Party on Wednesday night, on the eve of their big announcement, where she expressed her feelings for James to Us Weekly.

"I feel really lucky. 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," she said.