Preheat oven to 425° F. Line a baking sheet with parchment paper and set aside.
In a medium bowl, stir together flours, baking powder, salt, and sugar.
With a rigid pastry cutter, cut in butter until mixture resembles a coarse meal with larger pea size pieces. Add raspberries and fold gently to coat. Make a well in the center and then add buttermilk and egg. Stir just until combined, taking care to not over mix. The dough will be very soft.
Put a bit of flour in a bowl and coat your hands. Gently knead the dough 2 or 3 times, right in the bowl, coating your hands with additional flour as needed. The dough will be very loose. Using a large scoop, transfer scones to prepared pan, dividing into 9 equal portions in big rounded scoops. It works best to slightly compress the dough into the scoop using the side of the bowl, so the dough is compact.
Brush tops of dough with egg white and sprinkle generously with raw sugar. Bake until scones are golden brown, about 13 minutes. Let cool on pan for 5 minutes and then remove to a wire rack. Serve slightly warm or at room temperature.
