I love this idea. I cannot look at Flandre's crystal wings as not artificial. But if we instead assume that they're actually thin films composed to that shape, there is now an inherently organic quality to it which "organic crystals" simply cannot compete. This also opens up the possibility for the films themselves to take different shapes. Perhaps a shape like a dragon scale may be formed, and maybe even more of these "feathers".
On the other hand, insect-like wings on Flandre, huh... so she's a mosquit-
