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= Fluorescent Specimen
   =  Radioactive Specimen


2799

2800

2801

2802

2803

2804

2805

BASTNASITE-(Ce)
Oregon No. 2 Pegmatite, South Platte Pegmatite District, Jefferson County, Colorado

The South Platte District is an area very rich in radioactive and REE mineral deposits.  Bastnasite-(Ce) is one of the least common of the REE-bearing minerals found in this area.  The chemical composition of Bastnasite-(Ce) is
CeCO3F.  The Bastnasite-(Ce) from the Oregon No. 2 Pegmatite is alteration material, formed from the Allanite-(Ce) that occurs at this locality
As reported in MINDAT, according to the work done on the South Platte District pegmatites, the Bastnasite-(Ce) is “the result of late-stage magmatic solutions.  Basically, a whole lot of mysterious processes have occurred to create this very bizarre result”.  The Bastnasite-(Ce) is found as brick red-brown color masses, often exhibiting flat cleavage faces or parting cleavage faces.  All specimens are in natural condition, with the exception of # 2812 which has a sawed base.  The sawed base allows the specimen to stand upright, on edge, in perfect orientation for display.

Note:  The gram weights are given as a measure of size -- specimens are not priced by the gram.

 

ITEM
NO.

GRAM WEIGHT

SPECIMEN SIZE(INCHES)

SPECIMEN
PRICE

 

2799

10.25

1 1/8

3/4

1/4

$   9.00

 

2800

21.70

1 1/2

1 1/8

3/8

$  12.00

 

2801

41.50

1 1/2

1 3/8

7/8

SOLD

 

2802

43.05

2 5/8

1

1/2

$  22.00

 

2803

58.90

2 1/4

1 1/8

7/8

$  27.00

 

2804

87.90

3 1/8

1 1/2

7/8

$  40.00

 

2805

97.50

2 3/8

1 5/8

1

$  45.00

 

2806

110.50

2 5/8

1 5/8

1 1/8

$  50.00

 

2807

126.90

2 3/4

1 3/8

1 3/8

$  60.00

 

2808

152.80

2 1/2

2 3/8

1

$  75.00

 

2809

171.50

3 1/2

1 7/8

1 1/8

$  80.00

 

2910

277.00

3

2

1 3/8

$ 125.00

 

2811

333.00

3 1/4

2 1/2

1 3/4

$ 150.00

 

2812

603.00

4

3 1/8

1 5/8

$ 260.00

 

2813

5.75

Lot of numerous small specimens and fragments, +/- 1/8” to 3/8”

$    8.00         / lot

 

2814

12.50

Lot of numerous small specimens and fragments, +/- 3/8” to 5/8”.

$  16.00         / lot

 


2806

2807

2808

2809

2810

2811

2812
 


2724

2725

2726

DAVIDITE-(La) 
Billeroo Davidite Prospect (Becaroo Prospect), Mt. Victor Plumbago Station, Olary Province, S.A., Australia

The Davidite-(La) from the Billeroo Davidite Prospect was formed as crudely developed crystals and masses embedded in, and weathering from massive Quartz veins that cut through a granitic outcrop at the locality.  The specimens listed below were collected in 2007, and all are naturally formed masses of Davidite-(La) with irregular, unbroken surfaces and the typical red-brown Limonite-type surface patina seen on specimens found at this locality.  Chemical composition of  Davidite-(La) is:  (La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38

 

 ITEM
NO.

 WEIGHT(GRAMS)

 SPECIMEN SIZE(INCHES)

 SPECIMEN
PRICE

 

2724

12.70

7/8

3/4

1/2

SOLD

 

2725

20.45

1

3/4

3/4

SOLD

 

2726

27.95

1 1/8

3/4

3/4

$ 21.00

 

2727

50.25

1 1/4

1 1/4

1

$ 37.50

 

2728

86.67

2 1/8

1 3/8

1

$ 65.00

 

2729

91.98

2 1/4

1 1/2

3/4

$ 69.00

 


2727

2728

2729


2730

2731

2732

2734

SAMARSKITE-(Y) 
Spinelli Quarry, East Glastonbury, Hartford County, Connecticut

From a remarkable, small Eastern USA pegmatite deposit, the Spinelli Quarrry was first worked circa 1912, possibly as a commercial source of Feldspar.  These specimens were collected during the brief period between April 2008 and June 2013 when the last specimen mining took place with the permission of the property owners.  Item 2732 is a very crudely developed, black Samarskite-(Y) crystal section with no associated minerals.  Items 2730, 2731 and 2733 have small amounts of Microcline associated.  Item 2734 has a large, partially complete, 1 1/2” across “book” of pale gray Muscovite associated.  Item 2735 is a lot of 5 small masses of Samarskite-(Y) without matrix. Chemical composition of Samarskite-(Y) is:  (Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8

NOTE: This site is on closed, private property.   The site of this small quarry is now filled in, and remediated.

 

 

ITEM
NO.

 WEIGHT(GRAMS)

 SPECIMEN SIZE(INCHES)

 SPECIMEN
PRICE

 

2730

29.90

1 1/8

7/8

5/8

$  44.75

 

2731

30.01

1 1/2

5/8

5/8

$ 45.50

 

2732

32.93

1 1/4

3/4

3/4

$  50.00

 

2734

72.90

1 7/8

1 1/4

1

$120.00

 

2735

3.80

Lot of 8 small speci- mens, 1/8” up to 1/2”

SOLD

 


2736

2737

2738

2739

DAVIDITE-(La
Radium Hill Mine Site, Mingary, Olary Province, S.A., Australia  

A uranium mine started in 1906, with mining activity abandoned in 1961, this was Australia's first uranium mine.  The ore from the surface workings consisted primarily of massive Carnotite, associated with massive Davidite-(La).  According to the information given on MINDAT, the locality was more recently used as a low-level radioactive waste repository from 1981 to 1998 – another important mineral locality wiped forever from the list of important world mineral / mining localities – the type locality for Davidite-(La).  The specimens listed below were collected during the 1950’s from the Radium Hill mine site.  All specimens have rich amounts of massive black Davidite-(La), associated with small amounts of crystalline massive black Muscovite.  Items 2738 through 2741 also have very small amounts of matrix, and / or massive Quartz associated.  Chemical composition of  Davidite-(La) is:  (La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
 

 

 ITEM
NO.

 WEIGHT
(GRAMS)

 SPECIMEN SIZE(INCHES)

 SPECIMEN
PRICE

 

2736

33.45

1 1/8

1

5/8

$ 23.50

 

2737

59.70

2 1/8

1 1/8

3/4

$ 41.75

 

2738

67.30

1 5/8

1 1/4

1

$ 47.00

 

2739

70.50

1 3/4

1 1/4

7/8

$ 49.25

 

2740

100.00

2 7/8

1 5/8

7/8

$ 70.00

 

2741

105.00

2 1/2

2

1

$ 73.50

 


2740

2741

2839

METATORBERNITE  
Shinkolobwe Mine, Shaba Province (Katanga), Zaire (Democratic Republic of the Congo)

For background information on the Shinkolobwe Mine see the write-up for the Curite and Uraninite specimen, below.   The single Metatorbernite specimen available from this locality is a nice large cabinet size, with very good coverage of bright green crystals over the entire top surface of the matrix.  Nice large display size specimen, with two old collection labels. 

Specimen size:  3 1/4” X 2 1/4” across X 1 1/2” thick
Price:  $550.00
Order Item:  2839



2838

CURITE, URANINITE, URANOPHANE, SODDYITE, WOLSENDORFITE, GOLD 
Shinkolobwe Mine, Shaba Province (Katanga), Zaire (Democratic Republic of the Congo)

The Shinkolobwe Mine is best known for its production of Uranium-bearing minerals, with a total of 34 new minerals having been described from the deposit, and a total of 123 valid mineral species having been identified from the locality since it was first worked circa 1915.  The Shinkolobwe Mine was closed circa 2004, however, small amounts of the radioactive minerals occasionally become available through the redistribution of older mineral collections. A small amount of material also seems to continue to trickle onto the mineral specimen market from “black market” operations in the district around the mine site.   The specimen listed below is from a collection – not recently mined.  In addition to the orange massive Curite, black massive Uraninite is also present.   Other minerals identified on this specimen include Soddyite, Uranophane, and Wolsendorfite all in massive to micro vein form.  Submicroscopic amounts of Gold in massive / leaf form are present in several areas on the specimen, requiring ~ 50-60X magnification for best appreciation.

For background reading on this famous mineral locality, see the “Mineralogical Record” magazine, July-August 1989 (special Katanga! issue).  Copies of the special Katanga! issue are available for sale @ $30.  Order Item MR-20-4.   Click here for additional information:

NOTES REGARDING PRICING: The gram weight of the specimen is given simply as a measure of specimen size.  The specimen is not sold by the gram. 

Specimen size:  1 3/4” X 1” X 7/8”
mR/hr @ 1”: 18
CPM @ 1”:  12,000
Gram weight:  59.25 grams
Price:  $240.00
Order Item:  2838

 















 

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