Water Diamonds

Water diamonds happen when the angle of incidence changes from flat water reflecting the sky to a small wave with an incident angle allowing you to see into the water. It appears darker. Their characteristics are one or more pointed tops and a rounded bottom.

The black lines indicate concentric rings around you, the red outlines show an array of water diamonds, each with it's pointed ends on an imaginary concentric ring. With a little practice you can make this water diamonds with a stroke of a flat brush.