The four-way symmetry of this breathtaking engagement ring is one of the many components that makes it impossible not to stare at such a rare and sumptuous example of Art Deco craftsmanship. Set with an astonishing six diamonds (adding up to a full carat in total), kinetic openwork creates an elegant border that's dotted with a fine milgrain detail. The ring is solid platinum, and it's named for the Astor's famously opulent turn-of-the-century Rhode Island estate—because it's that friggin' fancy.

Currently, this ring is a US size 4.75, but we can re-size it up or down no more than two full sizes for an additional $90. Click here to add this option to your order. If you need help determining your ring size, email us for the ring sizing guide.

To see this piece in person, visit our shop in Nolita, New York.