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MINERAL SPECIMENS FOR DISPLAY

  NEW ACQUISITIONS


GOLD
German Bar Mine, Sierra County, California

This excellent small specimen is from an historic California Gold mine first worked in 1851.  The Gold is present as a large crystalline leaf.   Some of the high-grade ore from the German Bar Mine was found associated with coarsely crystalline to massive Arsenopyrite.  On this specimen the Arsenopyrite is massive, metallic gray, with a very small amount of crystallization present near the center of the specimen. 
Specimen size:  12.3 mm long X 9 mm wide

Item No.: 2928
Price:  $65.

GOLD
Forest Hill, Placer County, California

This crystallized mass of native Gold was found at one of the few Quartz lode deposits in the district.  The Forest Hill district is primarily a placer Gold mining area, the majority of production having come from drift and hydraulic mining of Tertiary channel gravel deposits.  It is roughly crystallized, and has a small amount of massive white Quartz matrix remaining in the tiny open spaces between the crystallized Gold.

Specimen size:  14 mm long X 7 mm wide
Item No.:  2929
Price:  $80.

GOLD
Placer County, California

From one of the lode deposits worked in the Mother Lode District of Placer County beginning in the late 1800’s, this is a showy and
aesthetic thumbnail size specimen of native Gold in the form of a hackly, crystallized leaf.  The piece is fairly three-dimensional, which gives it a beautiful dual-sided display with excellent crystallization around the peripheral edges.  The color is a rich golden-yellow hue and the luster is above average.  Temporarily mounted in a 2-tone plastic box with a transparent lid, black base.

Specimen size:  13 mm long X 6 mm wide
Item No.:  2930
Price:  $85.

GOLD
Winnemucca District, Humboldt County, Nevada

The Winnemucca District of northern Nevada was worked sporadically for Gold from several lode type deposits beginning in the late 1800’s.  This slightly rough, solid massive Gold specimen has a small amount of gray Quartz matrix associated in the open areas between the Gold.  Temporarily mounted in a 2-tone plastic box with a transparent lid, black base.
Specimen size:  13 mm long X 10 mm wide

Item No.: 2931
Price:  $65.


 


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GOLD
Michigan Bluff, Placer County, Nevada
This beautifully crystallized Gold specimen has very sharp, bright modified octahedral crystals visible on both sides of this exceptional specimen.  The Gold is finely crystallized all around and without damage.  Brighter than as shown in the photos; very reflective of light and therefore difficult to photograph.  Individual crystals measure from micro up to 1 mm size.  Many are cavernous. Very aesthetic and showy.  Ref: “The Mineralogical Record” magazine: 35(1): 65-72.
Specimen size:   15 mm X 11 mm across, X up to 3 mm thick
Item No.: 2932
Price:  $300.

 

PLATINUM
Pinto River, Mun. de Novita, Chocó Department, Colombia (type locality)

These recently acquired native Platinum specimens consist of metallic silver-gray color stream-worn placer nuggets with attractive, freeform, rounded shapes, without matrix.  For a change we were able to obtain some sizeable specimens, rather than the micromount size specimens previously offered from Russia, South Africa, Canada and Alaska.  Data provided by MINDAT: “From Spanish "platina", diminutive of "plata", silver (color). The new metal found in large placer deposits during the sixteenth-century Spanish conquest of South America was called "platina del Pinto" after the Rio Pinto, Colombia.”  The placer deposits of the Pinto River are still being operated at the present time!  All specimens will be shipped in foam-lined plastic boxes, for collection and display. 

Chemical composition:     Pt (native element)
Specific gravity:                 14 – 19 
Hardness:                            4 – 4.5

 

 

ITEM
NO.

WEIGHT
(GRAMS)

SPECIMEN
SIZE  (mm)

SPECIMEN
PRICE

 

2921

.97

8.0

6.0

$140.

 

2922

.98

7.5

5.0

$140.

 

2923

1.00

7.0

6.0

$140.

 

2924

1.02

9.0

5.0

$140.

 

2925

1.55

8.0

5.0

$230.

 

2926

1.28

10.0

5.0

$175.

 

2927

1.41

10.0

7.0

$210.


2921

2923

2922

2924

2925

2926

2927
 
             

 

GOLD
Potosi Claim, La Tosca Cut, Municipio Vetas, Soto Province, Santander Department, Colombia

These recently acquired native Gold specimens consist of bright metallic gold color stream-worn placer nuggets with attractive, freeform, rounded shapes, without matrix.  Some exhibit a small amount of crystallization.  Pricing is dependent upon the size / weight of the specimens, as well as their physical appearance.  Larger specimens are priced slightly higher / gram because they are much more difficult to obtain.  All specimens will be shipped in foam-lined plastic boxes, for collection and display. 

Chemical composition:     Au (native element)
Specific gravity:                 15.0  - 19.3 
Hardness:                            2.5  -   3.0


 

  ITEM
NO.

WEIGHT
(GRAMS)

  SPECIMEN  SIZE
          (mm)

  SPECIMEN
PRICE

 

2933

0.19

5.0

5.0

$16.

 

2934

0.24

10.5

8.0

$21.

 

2935

0.42

10.0

6.0

$36.

 

2936

0.53

10.0

4.0

$45.

 

2937

0.64

7.0

6.0

$55.

 

2938

0.76

10.0

7.0

$65.

 

2939

0.85

8.0

7.0

$72.

 

2940

0.95

8.0

6.5

$81.

 

2941

1.11

7.5

7.0

$94.

 

2942

1.35

13.0

11.0

$130.

 

2943

1.44

10.0

7.0

$135.

 

2944

1.72

15.5

9.5

$148.

 

2945

1.80

15.0

9.0

$170.

 

2946

2.15

17.0

7.0

$205.

 

2947

2.40

16.0

13.0

$255.

 

2948

2.90

17.0

9.5

$260.

 

2949

3.03

17.0

8.0

$280.

 

2950

3.65

19.0

12.0

$320.


2933

2934

2935

2936

2937

2938

2939

2940

2941

2942

2943
|
2944


2945

2946

2947

2948

2949

2950

 


 

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