Sphalerite, Pyrrhotite, Galena and Fluorite on Quartz, Santa Eulalia, Chihuahua, Mexico, Dr. David London Collection L-016, Large Cabinet 9.0 cm x 14.0 cm x 19.0 cm, $300. Online Nov 16.
Rich combination of high luster black sphalerite, bronze pyrrhotite and steel gray galena on a mound of drusy quartz. Note that several pyrrhotite crystals are partially replaced by galena; a classic paragenesis from skarn-type deposits. Sphalerite shows superlative twinning. Aesthetic and in top condition. A Mexican classic. Dr. London acquired the piece from McKee Minerals, Scottsdale, AZ in 1977.