No fewer than three Brooklyn ateliers collaborated with the New York designer Erin Sullivan to create her striking handmade Hex bookends ($1,500 each, sold individually). From metal shop to woodworking studio to lacquer specialist, the pieces welcome each phase of creation like a new season.

A single hexagonal cell in white lacquer offers refuge for a polished brass honeycomb interior—one of nature’s most sophisticated (and sweet) architectural achievements. Organic, elemental forms are signatures of Sulliv…