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Columbite-(Fe) : FeNb2O6 | |
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Little Patsy pegmatite (Patsy pegmatite), South Platte Pegmatite District, Jefferson Co., Colorado, USA A nice grouping of crude crystals; 4.5x3.4x1.5cm; Specimen was found along with samarskite and cyrtolite. These aggregates are very crumbly and obtaining whole pieces is difficult. specimen collected by Rudy Bolona; Oct 2005. |
| Photo ID: 141228 View Count: 105 | |
Fergusonite-(Y) : YNbO4 | |
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Little Patsy pegmatite (Patsy pegmatite), South Platte Pegmatite District, Jefferson Co., Colorado, USA Specimen found interleaved with large biotite crystals; 1.5cm; Specimen collected by Rudy Bolona; May 2007. |
| Photo ID: 141226 View Count: 121 | |
Fluocerite-(Ce) : (Ce,La)F3 | |
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Little Patsy pegmatite (Patsy pegmatite), South Platte Pegmatite District, Jefferson Co., Colorado, USA A crystalline nodule showing an actual hexagonal pyramidal termination; 2.7x2.5x1.8cm; Specimen collected by Rudy Bolona; May 2007. |
| Photo ID: 141223 View Count: 158 | |
Fluocerite-(Ce) : (Ce,La)F3 | |
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Little Patsy pegmatite (Patsy pegmatite), South Platte Pegmatite District, Jefferson Co., Colorado, USA Two excellent tabular crystals; 2x2x1; I believe the fluocerite from this locality is the best of species. If anyone knows of any better please let me know. Specimen collected by Rudy Bolona; May 2007. |
| Photo ID: 141225 View Count: 150 | |
Fluocerite-(Ce) : (Ce,La)F3 | |
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Little Patsy pegmatite (Patsy pegmatite), South Platte Pegmatite District, Jefferson Co., Colorado, USA A cone shaped crystalline nodule; 3.6x2x2cm; Fluocerite from this locality occurs in a wide range of interesting shapes, many showing actual crystal faces. specimen collected by Rudy Bolona; May 2007. |
| Photo ID: 141224 View Count: 132 | |
Fluocerite-(Ce) : (Ce,La)F3 | |
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Little Patsy pegmatite (Patsy pegmatite), South Platte Pegmatite District, Jefferson Co., Colorado, USA Specimen showing well crystallized mass with a bit of quartz for contrast; 6.5x3.5x2.5cm; the yellow section is the unaltered interior fluocerite the reddish coating is an alteration of bastnasite-(Ce). This is typical for the species. Collected by Rudy Bolona. Quite an aesthetic piece considering it is one of the rare earths. Collected by Rudy ... |
| Photo ID: 178834 View Count: 96 | |
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Little Patsy pegmatite (Patsy pegmatite), South Platte Pegmatite District, Jefferson Co., Colorado, USA A large, tabular specimen showing good crystal forms; 8.3x5x2.5cm; collected by Rudy Bolona. |
| Photo ID: 178832 View Count: 82 | |
Fluocerite-(Ce) : (Ce,La)F3 | |
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Little Patsy pegmatite (Patsy pegmatite), South Platte Pegmatite District, Jefferson Co., Colorado, USA Specimen showing well defined crystal faces; 7 x 4.5 x 3.8 cm; 275g.; This specimen is the largest one I have recovered from here. Collected by Rudy Bolona. |
| Photo ID: 222343 View Count: 49 | |
Samarskite-(Yb) : (Yb,Fe3+)2(Nb,Ta)2O8 | |
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Little Patsy pegmatite (Patsy pegmatite), South Platte Pegmatite District, Jefferson Co., Colorado, USA Glassy masses of Samarskite-Yb intermixed with ferrocolumbite in a 3 cm specimen from the type locality, Little Patsy Pegmatite, South Platte Distr., Colorado, USA. Specimen and photot: Knut Eldjarn. |
| © Knut Eldjarn | Photo ID: 94251 View Count: 357 |
Samarskite-(Yb) : (Yb,Fe3+)2(Nb,Ta)2O8 | |
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Little Patsy pegmatite (Patsy pegmatite), South Platte Pegmatite District, Jefferson Co., Colorado, USA Partially metamicted Yb-dominant samarskite (Yb content to be analyzed). Field of view is 5.3 mm. Obtained from Jiri Spalek (part of the author's material) - thanks! |
| © Ł Kruszewski 2007 | Photo ID: 133647 View Count: 165 |
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