Skip Navigation

May-June 2012

ResizeResize Text: Original Large XLarge


Subsequent to the Connoisseur's Choice column in Rocks & Minerals featuring molybdenite (March/April 2007), an exceptional specimen of this mineral was found on 1 August 2011 in the Henderson mine near Empire, Clear Creek County, Colorado. Specifically, it was found at the P75-515 draw point on the 7,210 level by a crew composed of Rick Quinn, Lee Fronapfel, Joe Hatrick, Dave Smith, Greg Bradley, and Larry Losch. The specimen weighs approximately 375 pounds and is 29 × 24 × 18 inches. An entire face represents the surface of a narrow fracture filled with bright molybdenite crystals—some of which are roselike aggregates—quartz, and fluorite. It has been named Henderson's Prize and likely represents the best and certainly the largest of America's molybdenite specimens. A case was built for its permanent display in the lobby of the mine office.

Although the Henderson is the largest underground molybdenum mine in North America, it is not known for good mineral specimens, partially because its block caving system of mining does not allow ready access to areas from which ore is being removed. Still, we do find the occasional creedite, fluorite, rhodochrosite, and, of course, molybdenite specimens.

Caption: The Henderson mine headframe and hoist building, Clear Creek County, Colorado. Danny Barton photo.

Caption: The molybdenite specimen known as the Henderson Prize in its specially constructed showcase in the Henderson mine office. Steve Rice photo.

The thirty-fourth annual Friends of Mineralogy symposium will be held in conjunction with the Tucson Gem and Mineral Show and will take place on Saturday, 16 February 2013. In addition to the Friends of Mineralogy, the symposium is sponsored by the Tucson Gem and Mineral Society and the Mineralogical Society of America. The theme is the same as the show theme: Fluorite. Presentations on descriptive mineralogy, classic and new localities, and related subjects are welcome. An audience of amateur and professional mineralogists and geologists is expected.

Anyone wanting to present a paper should submit a 200–300-word abstract to Julian C. Gray, Tellus Science Museum, PO Box 3663, Cartersville, GA 30120; email; phone 770/606-5700, ext. 415. Presentations will be twenty minutes in length. Abstracts must be submitted by 31 August 2012.

The American Federation of Mineralogical Societies (AFMS) is pleased to announce the winner of the 2011 program competition. Red-Gold and Polished Agates: Upper Michigan's Hidden Treasures by Wayne W. Sukow (Northern Virginia Mineral Club) earned the first place award. The program, in DVD format, reveals the beauty and mystery of copper that is hidden in some agates from Michigan's Copper Country. Almost microscopic particles twinkle in transparent layers in some agates, whereas in others, larger areas of agates are filled with or replaced by copper. AFMS affiliate societies and their members can borrow this program, as well as others, from their regional program library. For details, go to The website also gives information about the 2012 program competition. Questions can be directed to

Caption: Two halves of a copper-included agate specimen, 16 mm across, from the Wolverine No. 2 mine's poor rock pile. Collected, cut, and polished by David Harris, the specimen is now in the collection of Wayne Sukow, first-place winner in the 2011 AFMS program competition. Tom Shearer photo.

In this Issue

Taylor & Francis Group

Privacy Policy

© 2018 Taylor & Francis Group · 530 Walnut Street, Suite 850, Philadelphia, PA · 19106