Wholesale Rare Earth Element Minerals for Study or Display

By admin • Radioactive Minerals, Rare Pegmatites, Rare Species • 4 Dec 2013
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For your consideration, I have a number of ‘wholesale’ quantity samples of unusual rare earth element and U/Th minerals, mostly material from older collections which I’ve seen very little of on the mineral market-

1.)  very nice, rich specimens featuring patches of cream-white Fluorthalenite-(Y) which is a fine-grained replacement of yellowish yttrofluorite with red Bastnasite-(Ce), Allanite-(Ce), and several other species such as feldspar and quartz from the Snowflake Pegmatite, Teller County, Colorado. Excellent, complex specimens showing this unusual assemblage on at least one sawn side, and otherwise rough surfaces. 

$15 for a small representative specimen, $25 for a small-cabinet specimen, $50 for an excellent large-cabinet size specimen.

The occurrence of Thalenite-(Y from the Snowflake pegmatite was described by Adams et al. in 1962 in USGS Professional Paper 450-D. Onw of only a handful of worldwide localities for this rare species, now known to be Fluorthalenite-(Y). Rare!!

Specimen Dimensions: 4 x 5 x 2 cm. to 13 x 7 x 6.5 cm. Weight: 100-700 grams.

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2.) Fluocerite: Little Patsy Pegmatite, South Platte Pegmatite District, Colorado. 

 It is very unusual to see examples of Fluocerite with any real crystal faces, and I have a number of great specimen of this rare species from the South Platte Pegmatite District, collected in the late 1980′s when the find mentioned in the Mineralogical Record (Jacobson, 1986) was made. Relativelely sharp to rounded, very ‘fresh’ fluocerite with almost no alteration to bastnasite, in a matrix of quartz, albite and sericite. Noticeably dense in the hand, with a specific gravity of almost 6.0! Very Rare!!
Small individual crystal, ~1.5 x 1 cm: $15.00, Miniature with partial xls. on matrix: $20.00, miniature with sharp, good crystals in matrix, without damage: $50-75; several large rounded crystals in matrix up to 5 x 5 cm: $75.
Specimen Dimensions: 1 x 1 x 1.5 cm. to 12 x 10 x 5 cm. Weight: 20-500 grams. 
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3.) Great large cleavage sections of reddish-brown, solid Monazite-(Ce) from the Coats Pegmatite, Petaca, Rio Arriba county, New Mexico. You will receive one specimen from the flat pictured. Discount for multiple specimens.

 Measure ~15,000 CPM each on my Ludlum Model 3 Counter with the 44-9 probe. Monazite from this pegmatites was analyzed via EDS by Spilde et Al. (2011) to contain an interesting spread of rare earth elements, somewhat unusual for monazite is the relative abundance of heavier REE’s such as Dy, Sm, Y, Ho, etc. Excellent examples of Monazite from this interesting northern New Mexico pegmatite district, from an older collection. A Rare Pegmatite Classic!
$15.00 Each
 
 Specimen Dimensions:  average specimen is ~3.5 x 3 x 2.2 cm. Weight: ~45-75 grams each
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4.) Nice, solid specimens of the rare species Thorite-(Fe) with rare earth element and hafnium-rich ‘Cyrtolite’ Zircon from the Little Patsy Pegmatite, South Platte Pegmatite District, Jefferson County, Colorado. You will receive one specimen from the flat of small specimens pictured. Discounts on multiple specimens, or make me an offer on the flat. Rare material from an older collection.

 

$15 Each

 
These measure an impressive 15-20,000 CPM each on my Ludlum Model 3 Counter with the 44-9 probe and alpha shield on. The thorite forms rich masses with minor waxy reddish ‘cyrtolite’ zircon. See Haynes 1962 paper for more information on this occurrence at the Little Patsy Pegmatite. The thorite shows some crude crystal form in some specimens. Very Rare and excellent examples of these species for Colorado!
Specimen Dimensions: average specimen is ~4 x 2.5 x 3.2 cm. Weight: ~25-40 grams each. 
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