| Abstrakt: |
THE FOCUS OF THIS ARTICLE is on mineral collectors who include microcrystals that occur in Michigan's Keweenaw Peninsula as one facet of their collecting interests. A group of complex silver crystals (field of view 1.5 mm) found in a vug of crystallized prehnite at the Cliff mine, Avery shaft, Clifton, Keweenaw County, by Robert Nagel 2017. An isolated silver crystal with copper wires in a vug of prehnite and quartz (field of view 1.5 cm), from the Cliff mine, Avery shaft, Clifton, Keweenaw County. His best micros were found in the first three or four years when he collected heavily at the Mohawk mine, No. 1 shaft, Mohawk, Keweenaw County, and the Michigan mine, Ontonagon County. [Extracted from the article] |
