Jean Schlumberger took the cross-stitch from his family's textile mills and turned it into a diamond bangle. That was 1959. It hasn't needed revising since.
Round brilliant diamonds alternate with platinum X forms around the full circumference — 4.32 carats total, pavé-set. The X is the whole design. It's a stitch, not an abstraction, and once you see the textile origin you can't unsee it. Schlumberger's genius was recognizing that a functional needlework mark had geometry worth building jewelry around.
Platinum throughout the exterior. Inside the shank sits an 18K yellow gold hallmarking plaque — the only gold on the piece, and a Tiffany signature detail on Schlumberger bangles rather than a design element you'd see while wearing it.
The bangle is rigid and sized. This is the medium, fitting wrists up to 6¼ inches. That matters more than it does on a chain bracelet, because there's no adjustment. It goes on over the hand or it doesn't.
Schlumberger occupies unusual ground at Tiffany. He was the only designer besides Paloma Picasso and Elsa Peretti permitted to sign his own work, and his pieces have always been priced and produced closer to high jewelry than to the main collections. Tiffany rebranded the line as Sixteen Stone in recent years. Collectors still call it Schlumberger.
Condition is excellent. Pavé is complete with all stones tight, platinum retains an even finish, the interior gold plaque and hallmarks are legible, and the bangle holds its true round with no flexing at the shank.