Inspired by the colors and aromas of nature, cut fruit makes a very appealing centerpiece when it's done right. Just be sure to use a variety of fruits that will stay firm for the duration -- melon, pineapple, peaches, apricots and grapes would all be good choices. You'll also need wooden skewers of varying lengths and a stable base. If the idea of cut fruit displayed on skewers is too casual for you, try slicing lemons, limes or oranges into ice water and adding the mixture to a crystal…