Sphalerite on Dolomite      LaFarge Quarry, Lockport. Niagara County, New York.  Ex. Chuck Bowman collection.  A fine, aesthetic example measuring 8 x 4.6 x 3.1 cm.  Front face is best but some crystallization on back, as well.  Beautiful amber yellow crystals in large clusters.  Mineral tack on base.  No damage.  $60