"Lustrous black (brown in transmitted light) anhedral fergusonite xls. in granite pegmatite. Ref.: American Mineralogist, 56, nos.3-4, 395(1971) Gift of G.Y. Chao, Carleton University, 25 August 1971".
Probably mildly radioactive. Please ensure your home country post office will allow radioactive minerals before ordering? Contact us before ordering if you have any concerns.
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