The base photo is in Pin Light blending mode and the diamonds are the same photo in Pin Light again.

August 2018 iTunes Freebie
Pencil Lines Alphabet No. 05
Stamped Badges Summer Brushes and Stamps
Stamped Badges Beach Brushes and Stamps
Evergreens Solids Paper Pack
Scribbled and Scratched Photo Frame Brushes and Stamps No. 01
Messed Up Overlays No. 02
Beached Element Pack
To the Sea Element Pack
Oceania Element Pack