Preheat your oven to 400 degrees F and line a baking sheet with parchment paper.
In a large bowl, whisk together flour, baking powder, sugar, and salt.
Add the chilled, cubed butter to the flour mixture and cut in using a pastry blender or two forks until the mixture resembles coarse crumbs.
Gently fold in the diced strawberries, being careful not to crush them.
Pour in the half-and-half and stir until just combined; the dough will be sticky.
Turn the dough out onto a lightly floured surface and gently knead just until it comes together.
Form the dough into a 7-inch round disc and cut into 8 equal wedges.
Place the wedges on the prepared baking sheet, leaving space between each scone.
Brush the tops of the scones with the egg wash and sprinkle with turbinado sugar if desired.
Bake for 18 minutes or until the scones are golden brown and a toothpick inserted into the center comes out clean.
Transfer the scones to a wire rack to cool slightly before serving.