Shimmer is a fine particle mica that will add a shimmery affect to the water, giving it a pearl like look to your water.  Can be used in soaps.  It is recommended to use Polysorbate 80.  Use it to give you bath creations special effects. 

INCI: Mica (CI 77019), Titanium Dioxide (CI 77891), Tin Oxide (CI 77861)