Mila Kunis has been all over the place these last few years — after her memorable performance in 2010’s Black Swan, the Ukrainian beauty has booked a ton of other gigs, both on-screen and off. Most recently, she’s making celebrity news for becoming the new brand ambassador for luxury jewelry brand Gemfields. Though the collaboration was just announced last week, Kunis is already receiving praise for insisting to travel to the brand’s mines in Africa to witness the staff at work and learn about the ethically-sourced emeralds, rubies and amethysts that she will represent. The new partnership was celebrated last week in London where celebrity attendees like Florence Brudenell-Bruce, Theo Fennell, and Jacquetta Wheeler witnessed the unveiling of Gemfields’ new global campaign and perused one-of-a-kind creations from some of the world’s leading jewelry designers.