Preheat your oven to 375°F. Lightly grease a baking sheet, or line with parchment.
Mix the dry ingredients in a large mixing bowl. Mix the butter into the dry ingredients until it looks unevenly crumbly. Mix in the fruit and nuts until they're evenly distributed. Stir in the buttermilk.
Turn the dough out onto a well-floured surface and cut it into two pieces. (Keep sprinkling on flour if you need to.) Form each into a disk, and gently pat each disk into a round about 6" in diameter. Sprinkle each disk with coarse sparkling sugar, if des
Transfer the scones, still in their circular shape, the the prepared baking sheet. Separate the scones slightly; there should be about 1" between them at the outside edge. Bake the scones for 20 minutes, or until they're just beginning to brown. Remove th