Guerlain Poudre De Perles. What is it? It's an "illuminating perfecting pressed powder." This is one of the cult-favorite Guerlain Meteorites Balls spin-off in a travel-friendly pressed compact form. It was first introduced in 2008 as part of Guerlain's Summer 2008 CollectionGuerlain Poudre De Perles. What is it? It's an "illuminating perfecting pressed powder." This is one of the cult-favorite Guerlain Meteorites Balls spin-off in a travel-friendly pressed compact form. It was first introduced in 2008 as part of Guerlain's Summer 2008 Collection