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MINERAL SPECIMENS FOR DISPLAY


Click on specimen to see larger picture.

= Fluorescent Specimen
   =  Radioactive Specimen
 
 

EPIDOTE
Pampa Blanca, near Ica, Ica Dept., Peru
Epidote specimens from this relatively recent find have only been on the market for a few years. Based upon the quality and size of the crystals that have begun to show up on the market, this find promises to be one of major importance, on a worldwide basis. The specimen pictured here is a group of many more than 10 very sharp, striated, very lustrous, dark olive greenish-black terminated crystals  without rock matrix.  Specimens from this currently producing locality will undoubtedly be among the unobtainable "old classics" in a few years!! 
Overall specimen size: 2" X 1 1/8" X 3/4"
Order item MI-053.  Price: $70   SOLD


VIEW A

VIEW B

ORTHOCLASE Var. Adularia
Val Cristallina, Medel, Grisons (Graubunden), Switzerland
This specimen is from the display collection of Clifford J. Krueger, originally purchased in April 1968.  The crystal is a translucent-white color twin, with the twinning plane noticeable on the left side of the specimen, as shown in View B.  What appears to be a chip in the termination on the left side of the specimen is actually a slight separation in the junction of the twinning plane.  A smaller crystal protrudes from the main crystal, near the center of the specimen.  There is a small amount of matrix present on the back of the crystal, and a small amount of pale green Chlorite is associated.  Nice display specimen, with a fairly large crystal for this variety of Orthoclase.
Specimen size:  3” wide X 2” tall (the size of the crystal), X up to 1 1/4” thick at the base.
Order Item MI-1247
Price:  $95. SOLD

mi1092.jpg (38260 bytes)

SCHORL TOURMALINE with QUARTZ
Chacoya Mine, Huancavelica Dept., Peru
Very sharp, very shiny black terminated Schorl Tourmaline crystals almost completely cover a thin white Quartz matrix.  In a few small areas, tiny Quartz crystals can be seen protruding from underneath the Schorl crystals, i.e., the Quartz matrix was originally covered with tiny colorless Quartz crystals, before the deposition of the black Schorl crystals.  The Schorl crystals are predominantly standing up on edge, and are tightly intergrown, with the largest crystal measuring 5/8” across.  Very nice addition to any collection of Peruvian / Bolivian minerals, or Tourmaline group collection.
Order Item MI-1092
Specimen size:  2 7/8” across X 2 1/8” wide (this area completely covered with shiny black terminated crystals), X up to 1” thick.
Price:  $95.
 

mi1075.jpg (33958 bytes)

WOLFRAMITE, QUARTZ, MUSCOVITE
Xi Kuang Shan, Hunan Province, China
Three very shiny and lustrous, large black Wolframite crystals are standing up in a near parallel intergrowth, associated with Quartz crystals and small, pale gray color bladed Muscovite crystals. The Wolframite crystals exhibit excellent crystal form with pronounced striations on the prism faces, as well as growth hillocks on some of the faces of the crystal terminations. Several Quartz crystals are associated, to 5/8" in length. The pale gray color Muscovite crystals are hexagonal, and up to 3/8" across. The specimen has a natural flat base and stands up perfectly for display. No rock matrix. Choice specimen!
Specimen size: 1 3/4" tall, 1 7/8" wide, 1" thick at the base.
Order Item MI-1075 Price: $90.
ANTIMONY (native element, Sb)
Tom Moore Mine, Erskine Creek Mining District, Kern County, California
The Erskine Creek Mining District is located north of Mojave, ENE of Bakersfield, in Northeastern Kern County, California.  Antimony and Gold deposits were productive in this district in the early 1890’s.   Native Antimony was originally mined from a Quartz vein at the Tom Moore Mine.  By 1893, native Antimony was being mined from several prospects along the main vein, and was also found as nodular masses.  The specimens available from this historic California mining district consist of nodular masses of very bright silvery-metallic native Antimony.  In addition, Stibnite and several oxides of Antimony have been identified from this locality.  The outside of each of these nodular masses has a very thin layer, or “rind” composed of a mixture of light tan color massive Antimony oxide minerals.  The oxide minerals identified to date include Valentinite, Cervantite, and/or Stibiconite.  Each of the nodules has been opened to reveal the very bright silvery-white metallic native Antimony interior!  A few specimens have interesting microscopic sprays composed of flattened, acicular, dark red Kermesite associated.  Senarmontite was identified as near colorless octahedral micro crystals and translucent, pale gray masses in very small vuggy areas within the native Antimony.  When present, Stibnite is found as metallic gray masses and/or prismatic micro crystals, very obviously different in color from the bright metallic silvery-white color / luster of the native Antimony.  In the table below, the following abbreviations apply for the most important minerals present on each specimen:  A = Antimony, S = Stibnite, K = Kermesite, Se = Senarmontite.  Cervantite, Valentinite, and/or Stibiconite are present in varying amounts, as the light tan colored oxide layer on the outside of each of the nodules.    Specimen sizes range from ~1”, up to nearly 10” across!  Sizes in the table below are given in inches: width X height X depth.  In addition to the inch sizes, the gram weights are given.  Specimens are not necessarily priced by the gram – the gram weights are given only as a measure of relative specimen size.   453.60 grams = 1 pound.  The 4,100.00 gram specimen L., in the table below, is equivalent to about 9 pounds.  Item P., @ 4,310.00 grams, weighs roughly 9 3/4 pounds!
All of the photos accompanying this write-up illustrate sections of opened native Antimony nodules.  Items B., D., F., G., I., L., M., and P. are individual halves.  The others are pairs, with the individual size measurements of each half of the specimen given. When reassembled, both halves of each of these nodules will fit back together, with little or no hint of the bright shiny metallic silvery-gray native Antimony interior! Item C. has three pieces which, when reassembled, yield a complete nodule!  Each pair or group of 3 will be sold only as a lot, @ the price indicated.  A 10% quantity discount is given on all native Antimony specimens weighing > 500 grams.  This discount has been calculated into the price given, in the table below.  Items L. + M. are offered individually, yet they are halves of a complete, very large nodule.  For items L. + M., the 10% quantity discount is calculated in the price given below, and an additional 10% is offered, if the large pair is purchased together, i.e., a total of 20% off the list price.  Any of these specimens would make an excellent addition to a collection specializing in California minerals, native elements, ore minerals, etc.   Reference: “Minerals of California”, H. Pemberton, P.  50-51 (1983).

Discount price for items L. + M. (includes 10% quantity discount): $1,660.00 + $1,458.00 = $3,118.00 / pair
Less additional 10% discount for purchase of the pair: - $312.00 = $2,806.00 / net for the pair

A.

B.

C.
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D.
mi022e.jpg (27057 bytes)
E.
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F.
mi022gt.jpg (13669 bytes)
G.
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H.
mi022it.jpg (12691 bytes)
I.
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J.
mi022k.jpg (28183 bytes)
K.
mi022lt.jpg (12578 bytes)
L.
mi022mt.jpg (11827 bytes)
M.
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N.
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O.
MI022PT.JPG (10982 bytes)
P.
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Q.

 

 MI-022

  WEIGHT
(GRAMS)

SPECIMEN SIZE (INCHES)
WIDTH X HEIGHT X DEPTH

  MINERALS
PRESENT

SPECIMEN
PRICE

A.

33.50 1 3/8 1 1/8 3/8

A

 SOLD

B.

46.47 / pair 7/8, 7/8 5/8, 3/4 5/8, 5/8

A

 SOLD

C.

52.90 1 1/4 1 1/8 5/8

A

 $47.50

D.

64.90

1 5/8

1 3/8

5/8

A

 $58.50

E.

97.30 / pair

1 3/8, 1 1/2

3/4, 1

3/4, 5/8

A

 $87.50 / pair

F.

112.05

1 5/8

1 3/8

1

A, K, S

 $100.00

G.

894.50

4 1/4

2 1/2

2

A

 $563.50

H.

103.77 / pair

1 1/2, 1 1/4

1, 7/8

5/8, 5/8

A

 $93.25 / pair

I.

2,300.00

4 1/2

2 1/2

3 1/2

A, S, K

 $1,035.00

J.

151.44 / pair

1 3/8, 1 7/8

7/8, 1 1/8

3/8, 1

A, Se, S, K

 $136.25 / pair

K.

217.89 / pair

2, 1 3/4

1 1/8, 1 1/8

1 3/8, 1 1/8

A, K, S

 SOLD

L.

4,100.00

6

3

3 3/4

A, S

 SOLD

M.

3,600.00

5 7/8

2 3/4

4

A, S

 SOLD

N.

251.48 / pair

1 7/8, 2 1/2

1, 1 1/2

1, 1

A

 SOLD

O.

310.75 / pair

1 3/4, 1 5/8

1 1/4, 1 1/4

1 3/8, 1 1/2

A, S, Se

 $248.50 / pair

P.

4,310.00

9 3/4

2 3/4

6

A, S, K, Se

 $1,745.00

Q.

582.85 / pair

2 1/2, 2 3/8

1 3/4, 1 1/8

1 1/4, 1 1/2

A

 $419.50 / pair

R.

7.00

Lot of several small specimens of pure native Antimony, some with minor matrix present.  Sizes range from 1/8” to 1/2”. 

A

 $6.00 / lot


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