- Silver, Acanthite
- Thumbnail, 2.0 x 1.2 x 0.9 cm
- Kongsberg, Buskerud, Norway
Thumbnail. The parallel-growth silver crystals on this thumbnail of wire silver with acanthite from the mines of Kongsberg, Norway, remind me of a very weathered, hand hewn, wooden plank or board in a fence. The scattered calcite on the "plank" is a nice accent. Ex. Irv Brown Collection.