mtl DUFTITE on QUARTZ with PYROLUSITE, Black Pine Mine, Flint Creek Valley, John Long Mountains, Philipsburg, Granite County, Montana, 3 x 2.5 x 1 cm, Thumbnail | |
This was from an old accumulation in Montana of Black Pine Mine specimens. Here is a terminated Quartz crystal covered with coatings of brown Pyrolusite and light olive green duftite. |