Glassy and partially gemmy, burnished brown pyrochlore octahedrons aesthetically cover matrix on this very fine specimen from Veshnovogorsk, Ural Mts., Russia. Pyrochlore is an uncommon niobium oxide. This is a superb specimen with extremely rich crystals, of high luster, and good quality. It was found perhaps a decade ago. This is one of our "spikers" for the auction - probably the most esoteric expensive rock we have put to auction, but nonetheless a truly oustandign specimen for what it is! 7.7 x 5.8 x 3.0 cm