Popularized by partygoers during Prohibition as a sign of their unabashed defiance, cocktail rings once again stand out as the accessory du jour for commanding a room. Pile them on lavishly as you raise a glass to the new year.

Robert Procop Blue, Pink and Purple Sapphire Rings
Whether you go traditionalist with a ring that flaunts a single stone as its centerpoint (hello, stunning tanzanite!), or you lean more playful with stacked stones in a riot of shades, these three pieces promise to steal the show. Center: Tanzanite and Diamond Ring, providentjewelry.com; Left and right: Robert Procop Blue, Pink and Purple Sapphire Rings, yamron.com

Sylvia and Cie Byblos Oval Citrine and Diamond Ring
For a modern take on the cocktail ring, this citrine design more than delivers. Sylvia & Cie Byblos Oval Citrine and Diamond Ring, marissacollections.com

Gems of Note Multicolored Diamond Ring
Naples-based gemologist Brian Denney designed this beauty with multiple bands—lined in orange, green, brown and white diamonds—creating the look of stacked rings in one fabulous piece. Gems of Note Multicolored Diamond Ring, gemsofnote.com

Opal Ring with Pink Sapphire and Diamond Halo
White diamonds and pink sapphires add to the hypnotic effect of the 10.33-carat opal that anchors this rose gold piece from Provident Jewelry's estate collection. Opal Ring with Pink Sapphire and Diamond Halo, providentjewelry.com

Harry Winston Colombian Emerald and Diamond Ring
In this Harry Winston treasure, a juicy-hued, 6.81-carat Colombian emerald is ringed in white diamonds. Harry Winston Colombian Emerald and Diamond Ring, lamaisonyamron.com

Paul Morelli 18K White Gold Blue Sapphire Ring and 18K White Gold Pinkish Purple Ring
The squared-off lines read as modern in these elegant styles. Paul Morelli 18K White Gold Blue Sapphire with Diamonds Moderne Octagon Ring and 18K White Gold Pinkish Purple Spinel Cushion-Cut Ring with Diamonds, shannongreencollections.com
You (and everyone who admires your ringed hand) will want to dive right into the deep, blue cabochon lapis stone in this Verdura piece. Verdura Turquoise and Lapis Candy Ring, marissacollections.com