Los Angeles loves its crystals, but one particular piece is making the rounds right now. Halle Berry rocked a citrine necklace on the red carpet. Viola Davis was spotted off-duty in the same design. Jessica Chastain recorded a bathroom beauty tutorial in hers, while Rita Ora wore an amethyst version in London and aboard a yacht in Ibiza. Nina Dobrev, Julianne Hough, Rebecca Ferguson and Alessandra Ambrosio, too. So, who is behind this mysterious crystal and diamond-accented design, and why is it seemingly everywhere?

“It’s a piece to protect your peace,” explains actress Abigail Spencer (Suits, Grey’s Anatomy, Mad Men), who collaborated with close friend and L.A. jewelry designer Maya Brenner on the Retreat necklace collection, which retails on mayabrenner.com for $495. “It’s not just a piece of jewelry,” Spencer says. “It’s a way of life.”

Halle Berry wearing a Retreat collection necklace.

Featuring seven crystal necklaces...