Cathedral Cove
Mamabear's most favourite place.
It takes about 40 minutes to walk to it - or take a local boat for hire. The sand is generated from the mostly local lime-stone's - very few shells in it and is almost as white as you can see it in this image. Many of the beaches around the Coromandel are known for their "White-ness"! You definitely need sunglasses for protection from the white sand alone!
If you are lucky you can spot the odd Stingray on the beach looking for cheap food!!