Say what you will about what this ring is supposed to be, to me it looks just like a Calla Lily. That type of flower has a long green step, and then a white trumpet shaped petal, with a stigma in the middle. Here, the white petal is the 18k gold vermeil shape, while the stigma is a white pearl.
From another angle, this ring reminds me of a water lily, with the gold shape being the lily pad and the pearl being the flower.
This is by the designer Lara Bohinic and is called the “Coco ring.”
Find this calla lily ring at Benna: Here