Powellite on Calcite, Sterling Mine, Sterling Hill, Ogdensburg, N.J

Gravity tram, 20 ft below 180 level at 1040 N, 1270 W, Sterling mine, Ogdensburg, NJ. (Per R. Bostwick: That particular find of powellite comes from the gravity tram, 20' below the 180 level, mine coordinates 1270W, 1040N) A large grain of dark brown, glassy powellite in a matrix of coarse-grained, red-fl. calcite and green amphibole. This powellite grain, 2 cm across, is unusually large; most are the size of a pea or smaller. Specimen size: 7 x 6 x 4.5 cm.

Photo: E. Verbeek

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