I was inspired to change the color of a rhinestone hair claw on Ebay for under $3 a with some nail after seeing this post guest posted by Aunt Peaches on Elizabeth Banks website where she not only used nail polish, but also Sharpies to color in a clear rhinestone necklace to give it a unique look.
I was able to change the color several times within minutes just by painting on one layer of nail polish and allowing it to dry.