i know you arent a big fan of using oil, but i heard neroli oil works well as a binder for mineral makeup. neroli oil is made from orange blossoms and is a very delicate essential oil that smells amazing. it's non-toxic, non-irritant, non-sensitizing, non-photo-toxic. i know a lot of natural makeup companies use this product as a binder.
and it smells divine and i KNOW you are all about that!!!
special bonus on neroli is that used for aromatherapy, it relieves tension and anxiety.
if you have to use a binder, what could be better?
EDIT:
i just read you do need a carrier oil to mix with it, so if you do, use almond oil! it's what burt's bees uses for their baby products and if its good enough for baby skin...