|19590: Ferberite, Arsenopyrite, Muscovite,
and Quartz - Was $14
Yaogangxian Mine, Yaogangxian W-Sn ore field, Yizhang County, Chenzhou, Hunan, China
Miniature - 3.9 x 2.9 x 1.2 cm
Specimen status: Available
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One face of a lustrous, jet black ferberite crystal with interesting growth patterns is bare, while the opposite face is dusted with microcrystalline muscovite and several distinct but dull arsenopyrite crystals to 8 mm. We also see a 4 mm quartz crystal, nearly perpendicular to the ferberite face, and displaying distinct bluish fluorescence under shortwave UV (probably due to a high tungsten content). One minor incomplete spot along the edge of the ferberite where a small 'sidecar' ferberite was broken, but otherwise the specimen is in quite nice condition.