These crystals and reflections make me think of a Kaleidoscope. The word Kaleidoscope is derived from the ‘Ancient Greek meaning beauty, beautiful form or shape and tool for examination’—hence observer of beautiful forms. We can use this idea on clients to create color techniques. Make triangular or rectangular shapes on the head. Within each of the shapes place one of the complimentary colors at the same level e.g gold, cool red or warm red, then switch to another color on the next shape and so on, this will create a subtle Kaleidoscope effect that translate as a new spin on highlights and will look completely natural.