Is This Eva Mendes's Favorite Accessory or Her Engagement Ring?

Eva Mendes has been wearing a gorgeous emerald sparkler on her ring finger. And though the actress is wearing the ring on her right hand, the mysterious accessory has the Internet wondering if Eva and longtime boyfriend Ryan Gosling are secretly engaged. The couple, parents to 11-month-old Esmeralda, is very private about their relationship, so there is a chance they are set to marry but haven't shared the happy news with the world yet. Even if the cocktail ring just ends up being Eva's favorite jewelry piece, there's no doubt the stone is gorgeous. Keep scrolling to see more photos of Eva wearing the emerald, and then check out who modeled her new fashion line for New York & Company on Instagram.