SHARP cubic acanthite crystals to 5 mm, stacked end to end wit a slight association to quartz and matrix, make this a rather elegant and display-worthy piece from the old mines here. German acanthites are generally old (100 years and more), and come out of museum collections. This is no exception, having been traded out of Harvard in the 1970s to a well known collector. In person, it is much better... very fine quality, and a good size.