Adjust oven rack to lower-middle position and preheat oven to 400°F. Line a baking sheet with parchment paper.
In a small mixing bowl, whisk together sour cream (1/2 cup), vanilla (1 teaspoon), and eggs (1); set aside.
In a medium bowl, whisk flour (2 cups), 1/3 cup sugar, baking powder (2 teaspoons), baking soda (1/4 teaspoon), and salt (1/2 teaspoon) until evenly combined.
Using the large holes of a box grater, grate butter (8 tablespoons) directly into the flour mixture, stopping a few times during the process to toss the butter pieces into the flour. Use a pastry blender to cut the butter into slightly smaller pieces (the mixture should resemble a coarse meal) and stir in strawberries (1 cup).
Use a fork, and stir in half of the sour cream mixture into the flour mixture. Add the strawberries and remaining sour cream mixture and stir until most of the dry flour bits are incorporated, but the dough is still shaggy. Use your hands to press the dough against the bowl into a ball. (The dough will be sticky in places, and there may not seem to be enough liquid at first, but as you press, the dough will come together.)
Turn dough out onto a lightly floured work surface. Press the dough a few times, shaping it into a 6-inch diameter circle that's 1-inch-thick, until it just holds together (Don't overwork it or scones will be tough).
Sprinkle top with clear sparkling sugar. Cut into 8 triangles.
Transfer scones gently, using a spatula to lift them, onto the prepared baking sheet.
Bake until golden, about 14 to 16 minutes. Remove to a wire rack and cool. Drizzle cooled scones with glaze.