Triangle (or round, or any shape you fancy) charms. I used brass ones, similar to these.
Chain necklace (or chain, jump ring, and clasp to assemble- see an easy tutorial here).
Nail polish or acrylic paint
A dark color (I used navy blue)
A light color (I used white)
Two or more other colors (I used hot pink and lilac)
Glitter nail polish
Clear top coat nail polish or acrylic varnish
Cosmetic sponge