The spaceship is covered in a blob of translucent jelly, so that when it travels through space it can catch all the rainbows! This blue fluorite is from the much-coveted yaogangxian mine in China. The Yaogangxian Pluton composed mostly of granite is a complex structural belt that intruded Paleozoic and Mesozoic sedimentary rocks during the Late Jurassic, forming at 157 to 170 million years ago. When you are holding a Yaogangxian specimen in your hand, you are actually holding a piece of history that is as old as the dinosaurs, and many even older.