Sphalerite : ZnS, Pyrite : FeS2

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Copyright © Rob Lavinsky & MineralAuctions.com
minID: JJR-H98

Sphalerite : ZnS, Pyrite : FeS2

Copyright © Rob Lavinsky & MineralAuctions.com  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 10.3 cm x 6.2 cm x 5.4 cm

10.3 x 6.2 x 5.4 cm. A very hard-to-find specimen from the Black Cloud (Irene) Mine with great provenance. This attractive cabinet sized piece hosts many sharp, lustrous, well-formed, jet-black sphalerite ("marmatite") crystals measuring up to 7 mm associated with striated golden metallic pyrites on matrix. It should be noted that this piece was labeled as coming from the Irene Mine, which is technically the Irene Shaft of the Black Cloud Mine. This piece comes from the collection of noted field collector Geary Murdock, who found some of the finest quality aquamarines in the Sawtooth Mountains of Idaho. https://www.findagrave.com/memorial/36634006/geary-jack-murdock. The piece is accompanied by a label from Hal Miller formerly of Boulder, Colorado. Hal was a chemist, a well-known collector, mineral & mining enthusiast, and he actually worked on the Manhattan Project in the 1940s. Hal along with Richard Kosnar also co-wrote the "Colorado Mineral Belt" article in the "Colorado I" issue of Mineralogical Record in 1976.

This photo has been shown 19 times
Photo added:2nd Sep 2019
Dimensions:1800x1800px (3.24 megapixels)
Date/Time of Photo:19th Aug 2019 15:28:33
Camera:CANON EOS 5D Mark II
Software:Adobe Photoshop CS6 (Windows)
Exposure time:1/3s
Focal Length:85mm
ISO speed:100

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