Preheat oven to 375.

Mix together dry ingredients. Cut butter into small chunks and cut the butter into the dry ingredients until in pea sized pieces (the paddle attachment on a kitchen aid can be used, or your fingers). Mix in mango. Stir in cream until just mixed. On a floured surface divide into 4 balls and flatten till they are about 3/4" high and 5" wide. Cut into quarters. Place onto baking sheet and cook until golden brown, around 20 minutes. Remove and place on a metal rack to cool.

Mix lime juice, lime zest and icing sugar. Add more juice/sugar to get desired spreading consistency. Glaze scones when they are cooled and let the icing set.