Sometimes, a classic is what’s called for. Our spin on the traditional centers on an intense, velvety blue sapphire in a stately rectangular step-cut. Two lines of dramatically graduated diamonds give the ring a streamlined, Art Deco-like attitude. A Euro-style shank adds stability and distinctiveness.

• 8.22 × 6.15 mm octagonal blue sapphire, 2.33 cts, heated, Madagascar, with AGL report

• ten graduated diamonds, 2.0-3.0 mm, F/VS, 0.58 tcw, natural, Canada

• 950 platinum

• size 6.75