Perched majestically on matrix of smaller crystals is a large crystal of glassy and gemmy fluorite, with just a palest hint of green color. Its colorlessness and transparency is shocking, in conjunction. This, 5.5 cm crystal is so transparent that the term "invisible" could be used if looked at head on and the camera could not focus on the front face because it kept tryign to focus on the background BEHIND the crystal when we tried to photo it head-on to the front face. Thus, it had to be shot at an angle as you see here, which makes it look grayer and darker than it is in person. The back side has some beautiful negative molds where other crystals one were present. The main crystal is complete on all 3 faces you see here, contacted in back only. The presence of a few minor dings on the terminal edges pales in context to the other qualities of this wonderful fluorite cube. Ex Jeff Starr fluorite collection. This would have come out in the late 1980s, or early 1990s.