People have discussed stuff like this. Mica probably not great because it’s mineral, toners are a powdered plastic I believe and it gets melted and stuck to the paper.
Ages ago @rbtdanforth discussed using ceramic glaze and trying to selectively fire it with the laser. Not sure that went anywhere.
I think there may have been discussions of a colored version of Cermark-like stuff. There are options but I don’t know that anyones posted a big success.