Gemma is a smashed glitter bits multi iridescent with unicorn shifting colors. Gemma is part of the Smashed Glitter collection.
Magpie Glitter application tips:
Smashed Glitter Bits
Smashed glitter bits are larger pieces of glitter and are best applied via encapsulation in either gel or acrylic. 
6g of glitter
Photos credit @nailsbydawnd