i got bored so i decided to experiment with some glass pieces i picked up when i was jogging. using claire's nail polish i had gotten as a gift a while back, i painted double coats to ensure that the polish is completely opaque and consistent. when the final coat is half dry, attach the glass pieces . Once it is dry, you can add drops of polish to the areas where you wish to build up the glass. its my first try, so its pretty darn ugly . do apply OPI's base and top coat if you wish, but it would automatically decrease the glass' sparkling effect.
* do not that the glass used is tempered safety glass, so it breaks in pieces that are not sharp though to cut.