Blue Fluorite with Quartz from Yindu Ag-Pb-Zn deposit, Hexigten, Chifeng City, Inner Mongolia in China. The fluorite is so clear like glass and with great colours The Yindu mine in Inner Mongolia produces some of the most beautiful fluorite specimens in the world including eye fluorite. Under normal light, eye fluorite is a deep purple colour, almost black, but when shined through by another light source paler phantoms appear. This specimen is made of several high quality well-formed fluorite cubes.