Diamond Fever From rose cuts to heart shapes to ovals, from tennis bracelets to chain links to hoops—when you’ve got diamonds this gorgeous, do you really need anything else in your wardrobe? Red Carpet rose, white, and yellow 18k gold earrings with diamonds; $41,197; Le Vian; 877-2-LEVIAN; levian.com   Le Vian Red Carpet ring in 14k yellow gold with Chocolate and Vanilla diamonds; $15,397   Diamond cuff in 18k rose gold; $105,030; Siera Jewelry; 213-623-6370; sierajewelry.com     Show Off! If you’re looking for diamonds, JCK Las Vegas has everything you could ever hope for—and more. Our day-by-day guide will help you find your way to the best exhibitors and events at Mandalay Bay. Diamond gardenia brooch in platinum; $63,000; Oscar Heyman; 212-593-0400; oscarheyman.com   Flower brooch in 18k white gold with diamond