Molybdenite
Sangdong Mine, Sangdong-gun, Gangwon Province, South Korea
11.5 x 9.1 x 3.5 cm. Mineral specimens from this obscure and extinct large tungsten-bismuth-molybdenum mine worked from 1947-1992 are rare indeed. Splendent, waxy-feel, silver-metallic molybdenite disks are richly and attractively clustered in one corner of the large matrix of quartz and feldspar. Ex. Bob Trimingham Collection. Collected by Paul ...
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