Halle Berry is still proudly showing off some impressive ring finger bling. Since last week, the 45-year-old beauty has been wearing a large emerald ring ... sparking rumors that she may be engaged to beau Olivier Martinez.

The Oscar-winning actress, carrying her daughter's adorable pink backpack, was first seen with her sparkling bauble while grabbing lunch with Martinez in Beverly Hills last week. Then again over the weekend, Halle was rockin' the shiny stone in Malibu.

Come on, Halle ... are you going to be walking down the aisle for the third time?

Berry's rep has yet to respond to requests for comment.