Mineral make-up filler round-up (with iron oxides): Silk mica

Mich very kindly sent me a sample of TKB Trading’s silk mica to try, so I’ve been including it in everything lately. (It may be similar to mica powder from MakingCosmetics.com but the micron size is different!) But what exactly is it? Silk mica is a colourless, translucent mica with a large particle size of…