How can I make my own mineral liquid concealer? what do I mix the powder minerals with to make a liquid?

and it HAS to be all-natural. No talc, no chemicals, no preservatives. That is why I've gotten away from drug store concealers. Now I want to make my own concealer by using my natural mineral powders.How can I make my own mineral liquid concealer? what do I mix the powder minerals with to make a liquid?
powder minerals usually cannot mix with water, so i would try using an oil-based liquid. or you can pre-treat your undereye area with lots of moisturizer or a good eye cream before you put on the powder concealer.How can I make my own mineral liquid concealer? what do I mix the powder minerals with to make a liquid?
I've used bare minerals in the past and to get a wet coverage, this is what I did: wet a square sponge, dip in the minerals, and spot conceal using a corner of the sponge. I prefer the makeup dry, but many people like to use their minerals wet.