I got my Micas from www.tkbtrading.com.
They are called Pop! Micas. I have made my own eyeshadows for a long time but i have never thought of making a tutorial for it until i saw another girl's homemade mineral eyeshadows :)
I'll put up some "recipes" later. :3
Before you do anything , disinfect every thing you are working with. I use 70% rubbing alchohol.
Also, you should put on gloves and a dust mask.
To add more depth, keep adding colors until you are happy with the results.
If you want, you can snip off the corner of the baggie and transfer the eyeshadow into a 5 gram jar.