Release your inner boom shakalakalaka with this bold statement ring, which offers a whopping 38 carats of faceted black onyx in gleaming sterling silver. There's no mistaking the drama of this "retro mod" piece: whether slipped over gloves or worn casually with jeans, this sparkly gem centerpiece lends a touch of modern luxe that's truly timeless. 38-carat round faceted black onyx, in sterling silver. $150. 38-carat round faceted white quartz, in sterling silver. $150.