| mtl DRUSY QUARTZ on PYROLUSITE on QUARTZ, Black Pine Mine, Flint Creek Valley, John Long Mountains, Philipsburg, Granite County, Montana, 3.5 x 2 x 1.5 cm, Thumbnail | |
 | This was from an old accumulation in Montana of Black Pine Mine specimens. Here is a cluster of terminated Quartz crystal with a Pyrolusite coating with a druse Quartz over the Pyrolusite. This causes the sparkling druse to be black to brown. |
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