i've been reading from forums that you can bring out the color of mineral eyeshadow via a technique called foiling. basically mix the powder shadow with water or any mixing medium and apply.
i never tried it because i don't want to contaminate products. i hate to spoil the whole product just for the sake of trying out something.
since i'm bored and have plenty of time at home, i decided to do a bit of research. there are many visual demonstrations on youtube. you can also a how-to with pictures here.
i read that you can mix with water. most suggested not to because after water evaporates it leaves the shadow feeling dry and hard.
there are mixing mediums where you have to buy from specialty stores. i don't know where to get them.
thankfully there's something you can get easily. visine the eye drop. it costs aud$6.50.
it's suggested using eyeshadows that are shimmery to bring out the shinny foil effect. it's easier with powder form. with pressed eyeshadow you need a bit of work to dig the powder out. looks messy.
i'm using she dusting powder in karma. this is not my favorite product. i won't cry if it's messed up. it's green. not many greens look good on me. this green makes me look sick. why did i choose it? because it was marked down <-- my only reason to buy something i'm not so keen on.