while playing one day, I really wanted a different colored rhinestone for a card I was working on. I tried to make one with our SU! markers, but being water-based, the color came right off on my fingers (then I was really happy it was water-based). I tried reinkers with crystal effects, but all I got was a mess. I finally found that permanent markers work super fast and easy, and now I can have any color I want, they stay sparkly, take no time to dry, and I can make just as many as I need with no leftovers to get lost! I had a huge selection from a set I got at an office supply store, and pretty much every color turns out well. the lighter ones are pretty subtle, but against a white card, I think they'd show up ok.