Magnetite and Sphalerite     2,500 foot Level of the Zinc Corporation of America Mine, Balmat, St. Lawrence, County, New York.  Ex. Chuck Bowman, Z.C.A. miner and collector of specimen.  Rare, well documented, and important material that is unique to the mineralogical world.  It also ranks among the best known for the species.  This example shows cubes in beautifully formed, exceptionally high luster crystals.  3.7 x 3 x 1.8 cm.  Two small chips.  Nice sphalerites in clear, white and amber colored crystals.  Very showy.  $200