Cosmic Shimmer Iridescent Mica Pigment 20ml - Platinum. Cosmic Shimmer Iridescent Mica Pigment colours offer incredible versatility and can be used in various ways. For example, mix them with water to create a mica mist or a watercolour paint, mix them in other colouring mediums for custom colour, dust them over stamped images, the possibilities are truly endless. 20ml pot. Available in a variety of colours, each sold separately.