Whisk flour, baking powder, baking soda, sugar and salt well in a small bowl.
In a larger bowl, add the melted butter to the buttermilk, while stirring with a balloon whisk until butter clumps. Add peaches and stir. Then add flour mixture and fold until well blended (do not overmix).
Use a 1/4 C. silver portion/ice cream scoop to drop biscuits on parchment paper. Sprinkle tops with refined sugar. The biscuits will expand during cooking to be about 2 1/2" diameter, and 1 1/4" high. Makes 12. Cook 475 for 11 - 13 minutes.