How app star Elizabeth Potts parlayed her love of jewelry and passion for storytelling into Instagram’s coolest vintage bauble biz "Good morning, and welcome to the best day ­everrrrrr!” purred Elizabeth Potts, founder of The Moonstoned, in a video posted to the e-comm company’s Instagram feed (@themoonstoned) the week before Christmas. While chatting into the camera, she executed an adorable little dance that involved whipping her head from side to side, a huge smile on her lovely face. “It’s finally trunk-show day, and I’m really excited, in case you couldn’t tell.” It’s Potts’ (very infectious) passion for the pieces she handpicks—all vintage and antique, and often qu