Guerlain Terracotta Summer Glow Highlighting Face Powder. A natural sun highlighting powder with a shimmery texture that is natural not glittery. It is perfect for summer strobing thanks to the sun-inspired shade that matches all complexions thanks to the precious hints of gold contained in the formula. Its formula contains incredibly fine mother-of-pearl, and imitates the dazzling light of skin that has been left silky by the sun. With a brush, either apply Terracotta Summer Glow face highlighter alone or after Terracotta Bronzing Powder on the areas you want to highlight: the fuller areas of the cheekbones and the brow arch.