While on a hike today I came across a nice small sheet of mica. I often joke around with my partner when we go for walks in the park that I'm going to make another pair "one of these days..." But today I was alone and so started actually brainstorming.
A scene as through the Canon 1D Mark III with a 40mm macro.
And the same scene through the mica (very poor quality mica.)
I saved this sample to compare to later examples.