Following @frankbeverett, VP and sales director of Sotheby’s Jewelry in New York, is like taking a crash course in estate jewels. Glimpse museum-worthy pieces by JAR, Claflin, Belperron, and more—all via Everett’s unfussy, up-close-and-personal pics.

Boivin’s radish brooch

Cartier citrine c. 1940

Carvin French ruby ring

Paul Flato ’40s-glam pin

Raymond Yard c. 1952

Bangles by Schlumberger