Tetrahedrite : Cu6(Cu4X2)Sb4S13, Siderite : FeCO3, Quartz : SiO2

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Copyright © Brian Kosnar - Mineral Classics
minID: 0MQ-2AN

Tetrahedrite : Cu6(Cu4X2)Sb4S13, Siderite : FeCO3, Quartz : SiO2

Copyright © Brian Kosnar - Mineral Classics  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 5.2 cm x 2.7 cm x 1.2 cm

5.2 x 2.7 x 1.2 cm
Largest Crystal 0.7 cm

A beautiful Tetrahedrite specimen from the famous Central City District in Colorado. This area was the site of the first Gold rush in Colorado, and led to Central City being one of the most active communities in Colorado for nearly 40 years after the discovery of Gold. This piece comes from the collection of well-known Denver dealer and mineral collector “Mike” or “Mitch” Gunnell. By my father’s accounts, Gunnell was salty to say the least, but had impeccable taste, and amassed an impressive mineral collection of a few thousand specimens, many from Colorado. Near the end of Gunnell’s life, he started selling off his collection piece by piece, and since my father visited him on a regular basis, he was able to acquire many superb pieces over the years. This piece was purchased in 1979 from Gunnell, and since my father had just recently moved to Gilpin County, he was trying to get his hands on every good specimen from this area. My father told me that Gunnell had a good suite of Gilpin County minerals, and some were the best that he had seen from the area, which included this Tetrahedrite. Many sharp, incredibly well-formed, modified tetrahedral crystals of Tetrahedrite are associated with light golden discs of Siderite on both sides of the piece, and are sitting on minor sugary grey-blue Quartz. Ex. E. M. Gunnell Collection.

This photo has been shown 342 times
Photo added:27th Apr 2013
Dimensions:801x720px (0.58 megapixels)
Date/Time of Photo:21st Jul 2012 15:09:09
Camera:CANON EOS 5D Mark II
Software:Adobe Photoshop CS5 Windows
Exposure time:1/10s
Focal Length:90mm
ISO speed:250

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