This is an unusually clear, gemmy specimen of fluorite from Okaruso. It has sharp transparent crystals in a coke-bottle green color, which is rare from this locality. The smooth, glassy, wet-look-lustrous faces of the crystals are transparent, which helps show off the gemmy interiors. This is an outstanding example of  cubic fluorite from the Okaruso Mine in Namibia, in a rare color (actually, this is the first of this color I have ever seen).