Jewelers are shaking (or stirring) all kinds of concoctions this summer. Here’s just a taste of what they’re serving their thirsty customers: Kirk Masters & Sons, Richmond, Mich.  Masters’ Homemade Baileys1 can of Eagle Brand condensed milk1 cup of heavy whipping cream3 eggs 2 tablespoons Hershey’s syrup 1 tablespoon instant coffee 1 teaspoon vanilla extract 1 teaspoon almond extract1?¾ cups rumMix all in blender and serve cold. Jack Lewis Fine Jewelry, Bloomington, Ill.The Jack Lewis Signature Cosmopolitan (pictured) 2 parts Stolichnaya vodka1 part Cointreau3 parts cranberry juice Shake with ice and garnish with lime.J. Thomson Custom Jewelers, Oklahoma City The Opal Cocktail1?½ ounces gin½ ounce triple sec1 ounce orange juice2 dashes orange bittersCombine all ingredients in a shaker half-filled with ice and serve. Schumacher Diamond Inc., Bismarck, N