Preheat oven to 400° F.
In a medium mixing bowl, combine flour, granulated sugar, baking powder and salt. Mix well; set aside.
Add cold butter in very small pieces (I like to use a cheese grater and grate the butter directly into the mixing bowl).
Use a fork or pastry blender to combine butter with dry ingredients.
Add beaten egg and half & half or light cream. Mix just until combined.
Fold in chopped mango.
Transfer dough to a lightly floured surface; form it into an 8 inch disc. Cut into 8 equal wedges and place wedges on an ungreased baking sheet.
Bake at 400° for 15 minutes or until golden brown.
Cool 10 minutes on baking sheet, then remove to a wire rack to cool completely.
Once cool, combine icing ingredients and drizzle scones with icing as desired.