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, damage-free crystals. With these are clear sphalerites to .4 cm each (this is unusually large for the occurrence). 5 x 4.3 x 3.2 cm. This is a very three-dimensional piece with many surfaces showing fine, damage free, high luster crystals. $275