Black Cloud Mine
MI-1364
MI-1366
MI1367
MI-1368
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SAMARSKITE-(Y)
Black Cloud Pegmatite, South Platte District, Teller County, Colorado
The Black Cloud Pegmatite is located in the NEΌ, NEΌ sec. 9, T.13S., R.70W
in central Colorado. This pegmatite is considered to be part of the South
Platte District because of similar structures and mineral occurrences.
Mineralization is a zoned pegmatite body in granite, with the primary
minerals being Quartz, Feldspar, and Fluorite. Workings include a large
open cut with 2 benches. The accompanying photograph of the locality was
taken in the summer of 2008, courtesy of Rudy Bolona, a Colorado mineral
collector. Samarskite-(Y) is an uncommon radioactive, uranium and rare
earth element bearing mineral with the composition (Y,Fe,U)(Nb,Ta)04.
Specimens consist of vitreous luster, brown-black massive Samarskite-(Y),
accompanied by small amounts of a light colored matrix, probably massive
Feldspar.
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MI-
ITEM
NO. |
WEIGHT
(GRAMS) |
SPECIMEN SIZE
(INCHES) |
mR/hr @ 1
CD V-700 GM COUNTER |
CPM @ 1
CD V-700 GM
COUNTER |
SPECIMEN
PRICE |
|
1364 |
8.65 |
1 |
1/2 |
3/8 |
5.0 |
3,000 |
SOLD |
|
1366 |
12.10 |
3/4 |
5/8+ |
1/2 |
5.0 |
3,000 |
$ 15.75 |
|
1367 |
19.05 |
1 1/4 |
3/4 |
5/8 |
7.0 |
5,000 |
SOLD |
|
1368 |
20.95 |
1 |
3/4 |
1/2 |
7.0 |
5,000 |
$ 27.25 |
|
1479 |
3.85 |
5/8 |
3/8+ |
3/8 |
3.5 |
2,250 |
$ 5.00 |
|
1480 |
7.95 |
3/4 |
5/8 |
1/4 |
4.5 |
2,750 |
$ 10.25 |
|
1481 |
18.25 |
1 1/8 |
3/4 |
5/8 |
6.0 |
4,250 |
$ 23.75 |
|
1482 |
30.86 |
1 1/2 |
1 1/4 |
1/2 |
10.0 |
7,500 |
SOLD |
|
1483 |
33.92 |
1 1/8 |
3/4 |
5/8 |
10.0 |
7,500 |
$ 44.00 |
|
1484 |
40.40 |
1 1/2 |
1 |
3/4 |
10.0 |
7,500 |
$ 52.50 |
|
1445 |
36.60 |
1 3/8 |
1 |
5/8 |
10.0 |
7,500 |
$ 47.50 |
|
1446 |
81.15 |
2 |
1 1/8 |
1 |
12.0 |
8,500 |
SOLD |
|
|
|
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BOTTOM
FRONT |
URANINITE, CLAUSTHALITE
Alberoda, Schlema-Hartenstein District, Erzgebirge, Saxony, Germany
This Uraninite specimen is from one of the best known German occurrences for
Uraninite. The Uraninite is comprised of small black nodules scattered
throughout the matrix, rather hard to see without magnification. Please
refer to the accompanying photograph, with indicators showing the presence
of the Uraninite as well as an outline surrounding and highlighting the
associated dark metallic gray Clausthalite. Uraninite is: UO2,
and Clausthalite is a rare lead selenide with the composition PbSe.
Gram weight: 251.30 grams
Specimen size: 3 1/4 X 2 5/8 across, and up to 1 1/4 thick
mR/hr @ 1: 8
CPM @ 1: 5,000
Order Item MI-1485
Price: $145.00
 |
= Fluorescent
Specimen
