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Steve Stuart August 05, 2012 01:28AM
Hello, all!

I have been looking more closely at several nice specimens of calcite from this mine, especially the matrix under the microscope. Found these interesting associations of iridescent chalcopyrite with what looks like silver, but is probably siegenite. Any other opinions before I post them to the Sweetwater gallery?


open | download - 424 Chalcopyrite, siegenite 7b.jpg (47.6 KB)
open | download - 424 Chalcopyrite, siegenite 8c.jpg (44.9 KB)
open | download - 424 Chalcopyrite, siegenite 6c.jpg (49.1 KB)
Chester S. Lemanski, Jr. August 05, 2012 01:30AM
Siegenite would my guess as well based on the color and lack of tarnish. Just a guess. Beautiful photos. Thanks for posting them on Mindat.

Darren Court August 05, 2012 02:18AM
Great photos, Steve, and my guess would also be Siegenite.

Steve Stuart August 14, 2012 01:53AM
Moving from the micro world to the macro, here are two images of a nice doubly terminated calcite on matrix from the Sweetwater Mine. The calcite is about 4 cm in length. Image one is under incandescent lighting on a white background. Image two is under midwave UV (about 310 nm). All of my small suite of Sweetwater calcites show a strong fluorescence of magenta with a tinge of orange under MW UV. The response under SW and LW is a much weaker orange. The dolomite matrix shows a cream color under MW with no phosphorescence.


open | download - Specimen 2010.JPG (103 KB)
open | download - 2010 calcite 4.JPG (400.4 KB)
MIchael Sharpe August 18, 2012 04:21PM
A find from SE MO Valles Mines area. NOT listed on Mindat.
open | download - drusyq03.jpg (24 KB)
open | download - drusyQuartz02.jpg (395.5 KB)
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