CAN’T-MISS ­COLLECTIONStudy in ContrastsPhillips House plays with foils in its new Contrast collection ­featuring pairs of malachite and tsavorite, and kyanite and blue sapphire, in ­yellow gold (a hematite and diamond combo is in the works). “It’s the notion of ­contrast—two distinct stones in ­distinct styles, ­sharing the center stage,” explains codesigner Lisa ­Frankel. Retail prices start at $900.Love Always bracelet in 18k gold with kyanite and 0.18 ct. t.w. blue sapphire; $3,950; Phillips House, Miami Beach, Fla.; 800-892-5656; phillipshouse.com Lupita earrings in 18k gold with Sleeping Beauty turquoise and diamonds, $27,000, carlaamorim.comHOT STOCK TIPAmerican BeautyWhen most people think about turquoise, the Sleeping Beauty variety is what they envision: a soft, creamy blue prized for its smooth, consistent appearance. But supplies are limited. The Ar