Mineral Classics
Britholite-(Ce) / Allanite-(Ce) on Microcline
Britholite-(Ce) / Allanite-(Ce) on Microcline
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A rich specimen, and a great representation of this extremely hard to find material. This specimen was personally collected by my father, Richard Kosnar, on April 15, 1973. It features brownish areas of the uncommon phosphate, Britholite-(Ce) associated with greenish grey Törnebohmite-(Ce) which are covered on one side by a dark band of Allanite-(Ce) with so-called pinkish tan “Cerite” and pinkish Microcline. The specimen was analyzed by Gene Foord years ago, and in his communication with my father mentioned that “Cerite” on the piece may actually be Bastnasite. If you collect this material, don’t miss out on this specimen.
Specimen# CO712B14
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Locality: Jamestown Pegmatite, Jamestown District, Boulder County, Colorado
Dimensions: 4.7 x 3.3 x 1.6 cm
Largest Crystal:
Size Category: miniature
Fluorescence: NONE