Beautifully perched on a cluster of intergrown, lustrous, battleship-gray crystals of galena, are two amazing, almost invisible, glassy and gemmy, pastel-green fluorite crystals. The larger is 5.25 cm in length and both are absolutely stunning for their clarity and sharpness, with almost no edge wear (just a few very minor rubs). Ensconced within and going through the galena is a single deeper green modified octohedral fluorite crystal, that imparts the color to what otherwise would be the totally colorless cubes. In fact, the galena is in the shape of a cast, having formed over something else yet. Under fluorescent light the fluorite exudes a rich purple color. Interestingly, a layer of calcite resides between the fluorite and galena and it glows a lovely light brown when under fluorescence. This is an outstanding Naica fluorite of highly unusual aspect for its large, sharp, clean cubic form at a locale where most such crystals are heavily modified. Also, they are unusually large and glassy for this locality. It is a remarkable specimen, overall - very much more impressive in person