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July-August 2011

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Letters

CONNECTICUT UPDATE

Reexamination of specimens from closed localities can yield surprising results. X-ray diffraction analyses of a specimen (shown here) collected at the Strickland pegmatite, Portland, Connecticut, recently proved this point. The previously misidentified specimen has a 5-cm crystal of chocolate-brown wodginite in an oriented overgrowth on cassiterite, reminiscent of those from a small occurrence in Minas Gerais, Brazil (Dunn et al. 1978). The matrix of this same specimen contains foitite grading into elbaite and the uncommon zeolite gobbinsite mixed with quartz. Foitite and gobbinsite are likely new species for the state.

Caption: A 5-cm crystal of wodginite on cassiterite from the Strickland pegmatite, Portland, Connecticut. The specimen was collected by Albert Sebela ca. 1935 and is now in the Bruce Jarnot collection; Jeff Scovil photo.

Caption: A 5-cm crystal of wodginite on cassiterite from the Strickland pegmatite, Portland, Connecticut. The specimen was collected by Albert Sebela ca. 1935 and is now in the Bruce Jarnot collection; Jeff Scovil photo.

REFERENCE

1. Dunn, P. J., Gaines, R. V., Wolfe, C. W. and Barbosa, C. P. (1978) Epitaxial wodginite and cassiterite from Lavra Jabuti, 9, pp. 14-18. Mineralogical Record, Baiaxio, Galiléia, Minas Gerais, Brazil.

Bruce M. Jarnot
Prince Frederick, MD

PHOTOGRAPHY SEMINAR AND PHOTO COMPETITION

The twenty-eighth annual seminar on mineral photography will be held at the fifty-eighth annual Tucson Gem and Mineral Show in the Copper Ballroom of the Convention Center on Thursday, 9 February 2012, 1–3 P.M.

Regarding the photo competition, winners will be chosen by a panel of judges and announced the following Saturday evening during the awards banquet. A cash prize will be given for first place in each category. The rules are as follows:

  1. No more than two entries are allowed per person.

  2. Slides must be original 35-mm transparencies in standard 2-inch mounts.

  3. Written on each slide must be the mineral name, locality, and size, either “macro” or “micro” category, and the photographer's name and postal address.

  4. Entries should be mailed to me at the address below, to be received by 15 January 2012, or hand-delivered to me at the Tucson Show. (All entries will be returned.)

  5. In addition to slides, digital images as high-resolution JPGs are also acceptable and can be sent to the email address below. CDs can be mailed to the postal address below.

Winners in the 2011 contest were John Jaszczak in the microspecimen competition and Bruce Cairncross in the macrospecimen competition. (See accompanying photographs with specimen information.)

Caption: Winning photo in the “micro” category: Goethite and pyrite specimen, 3 mm across, from the MacLeod mine, Wawa, Ontario, Canada; A. E. Seaman Mineral Museum specimen, John Jaszczak photo.

Caption: Winning photo in the “micro” category: Goethite and pyrite specimen, 3 mm across, from the MacLeod mine, Wawa, Ontario, Canada; A. E. Seaman Mineral Museum specimen, John Jaszczak photo.

Caption: Winning photo in the “macro” category: Topaz and quartz specimen, 16.5 cm across, from Gilgit-Baltistan, Pakistan; Desmond Sacco specimen, Bruce Cairncross photo.

Caption: Winning photo in the “macro” category: Topaz and quartz specimen, 16.5 cm across, from Gilgit-Baltistan, Pakistan; Desmond Sacco specimen, Bruce Cairncross photo.

Jeff Scovil
PO Box 7773, Phoenix, AZ 85011
 Email: jeffscovil@earthlink.net

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