I did it. I have taken 10k photos with my 5DMkIII, using the Metz Macro flash ring.
Ruby Zoisite
I took this to three different lapidaries, and none of them could identify it. It's very dense for its size. It's not iron pyrite. Two of the lapidaries were certain it's meteoric in origin, and one said it could be but couldn't confirm it. Only way to confirm is to destroy it in testing.
Rose Quartz
Amethyst Quartz