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.
:)

Here is what i used.
I got the Micas from TKB Trading and i got the baggies and stackable jars from Michaels.

Then decide what color you would like to make.
I'm am going to make a light purple color.

Start by picking out the main hue (purple) then add a scoop of that in your baggie.

If your color has two tones
ex: blue green
add the second hue

If you want to deepen the color, add a a scoop of it's complimentary color.
(The color across from it on the color wheel)

If you need to lighten or deepen the color, add a scoop of either black or white.

Then mix it all up !

To add more depth, keep adding colors until you are happy with the results.

I like to keep what i've made organized by numbering them then putting the color on a piece of tape.
Then i tape it into my sketch book along with the "recipe" so if i run out of the color, i can make it again.

If you want, you can snip off the corner of the baggie and transfer the eyeshadow into a 5 gram jar.