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RARE MINERALS, NATIVE ELEMENTS & MICROS FOR DISCRIMINATING COLLECTORS   

  
 

RHONITE
Nickenicher Sattel, Laacher See District, Eifel, Germany

The Rhonite specimens from this noted locality have very dark red, very sharp, individual terminated micro crystals scattered over the surface of a very vuggy matrix.  Another amphibole mineral, with pale orange-tan color crystals, is present on some of the specimens.  These crystals are possibly Richterite, but our supplier did not furnish us with the identification of the amphibole mineral.  All specimens are strictly for micromount preparation, or systematic collection.  The Rhonite, and the unidentified light orange-tan color crystals, must be viewed with at least 10-15X magnification, and higher magnification is recommended for best appreciation of the crystallization.  These specimens were collected in 1991-1992.  Additional photos of Rhonite specimens from Nickenicher Sattel can be seen on MINDAT. 

NOTE:  The accompanying photos were taken with a Dino-Lite digital microscope.  For information on the Dino-Lite digital microscope, click here.

Click for larger images


2208

           

 

ITEM   NO.

SPECIMEN SIZE(INCHES)

SPECIMEN
PRICE

 

2208

3/8

1/4

1/8

SOLD

 

2209

1/2

3/8

1/4

$ 24.50

 

2210

1/2

3/8

1/4

$ 26.50

 

2211

5/8

1/2

3/8

$ 28.50

 

2212

3/4

1/2

3/8

$ 30.00

 

2213

3/8

1/4+

1/4

$ 18.00

 

2214

5/8

1/2+

1/4

SOLD

 

2215

5/8

1/2

1/2

SOLD

 

2216

1 1/2

3/4

1/2

$ 38.50

 

2758

2 1/2

1 5/8

1

$ 65.00

 

 

 

 

 


2213

2214

2215

2216

2758
WHOLE SPECIMEN


2758
MICRO PHOTO

2209

2210

2211

2212

TELLURIUM (native)
San Miguel Mine, Moctezuma District, Sonora, Mexico

Massive, metallic silver-gray native Tellurium is present as rich veinlets disseminated in light colored Quartz / Barite matrix.  Pricing is according to the richness of the native Tellurium.   Associates on items 2131 and 2132 include massive, pale yellowish-white Paratellurite.


A.

B.

C.
|
2131


 

 

 

ITEM
NO.

SPECIMEN SIZE
(INCHES)

SPECIMEN
PRICE

 

1127 A

3/4

5/8

3/8

$  16.00

 

1127 B

1 1/2

1

3/4

$  18.50

 

1127 C

1 7/8

1 1/2

3/4

$  28.50

 

2131

1 1/8

1 1/8

5/8

$  30.00

 

2132

1

1

7/8

$  35.00

 

2133

1 ½

1

3/8

$  28.50

 

2137

2 ¼

2 ¼

1 1/8

$  65.00

 

2138

2 5/8

2 ½

2 ¼

$  95.00

 

2139

3 5/8

3 ¼

1 ¾

SOLD




 


 


2132


2132

2133

2137

2138

2139


 

CLINOCLASE
Copper Stope, Majuba Hill Mine, Pershing County, Nevada
The best references to the finds of Clinoclase from the Copper Stope at Majuba Hill are in the following back issues of the “Mineralogical Record” magazine:
January-February 1985 (Nevada issue) -- article covering Majuba Hill on Pages 57-72, Clinoclase described on P. 64-65.
May-June 1993 – article covering Majuba Hill on Pages 171-180, Clinoclase described on Page 177.
The specimens featured here were collected in the Copper Stope by Martin Jensen in 1992-1993, circa the coordinates 1760N, 370W, about 55 feet above the level.  Jensen is the author of both of the articles referenced above.  The crystals on all specimens are dark blue-green, either as rich intergrowths of prismatic crystals, or as intergrowths of slightly curved rhombohedrons (Clinoclase is actually monoclinic). Chemical composition is:  Cu32+(AsO4)(OH)3

The two “Mineralogical Record” references are available for purchase, as follows:
Jan-Feb 1985, Vol. 16, No. 1 (Nevada issue)   $12.00                                   May-June 1993, Vol.  24, No. 3    $12.00

 

 

MI-

SPECIMEN SIZE
(INCHES)

SPECIMEN
PRICE

 

1635

7/8

5/8

5/8

SOLD

 

1636

1 1/4

1 1/8

1/4

SOLD

 

1637

1 5/8

1 1/8

7/8

SOLD

 

1638

1 3/8

1 3/8

1

$  18.00

 

1639

1 3/4

1 3/8

5/8

SOLD

 

1640

1 7/8

1 3/8

1 1/8

$  35.00

 

1641

1 7/8

1 1/2

5/8

$  35.00

 

1642

2

1 5/8

1

$  38.50

 

1643

2 1/2

2

3/8

$  55.00

 


MI-1635

MI-1636

MI-1637

MI-1638

MI-1639

MI-1640

MI-1641

MI-1642

MI-1633
 

 

COWLESITE
Burnt Cabin Creek, Spray, Wheeler County, Oregon
The Burnt Cabin Creek occurrence of Cowlesite has provided some of the best quality specimens found at any of the Oregon occurrences.  Vugs completely lined with translucent white micro spheroids of Cowlesite are present on each of the specimens listed below.  Close-up photos of the vugs are shown here.  The vugs are in/on dark charcoal gray color basalt matrix. All items, except E., have sawed bases.  Additional information can be found in “Zeolites of the World”, Rudy Tschernich, P. 126-127 (1992).  All specimens were collected and prepared by R. Tschernich.

MI-1298

VUG SIZE
(MILLIMETERS)

SPECIMEN SIZE
(INCHES)

SPECIMEN
PRICE

A.

8 X 6

1 3/8

1 1/8

3/8

SOLD

B.

9 X 8

1 1/2

1 1/8

1/2

SOLD

C.

6 X 6 & 4 X 4

1 1/8

1 1/8

1/4

SOLD

D.

12 X 6

1 1/4

3/4

1/4+

SOLD

E.

15 X 12

1 1/4

1 1/4

1

SOLD

F.

15X 14

1 3/8

1 3/8

3/8

SOLD

More coming soon, or inquire.


A.


B.


C.


D.


E.


F.

All photos taken with the Dino-Lite Digital Microscope

 

TERLINGUACREEKITE
Perry Pit, Mariposa Mine, Terlingua Mining District, Brewster County, Texas (type locale)
Terlinguacreekite was first found in very small amounts at the McDermitt Mine in Humboldt Co., Nevada.   The unknown was present in such small amounts it was not possible to do the necessary work to complete the characterization so the mineral could be named.  Circa 2002, an orange to yellow-orange, crystallized, unknown mineral was encountered in the lower level of the Perry Pit at Terlingua.  It was determined to be identical to the massive unknown mineral that had previously been found in Nevada.  The general appearance of the Terlinguacreekite is as micro crusts of variable thickness, deposited upon Calcite crystal sections.  Most Terlinguacreekite crusts are thin and almost cryptocrystalline, with no discernible crystal form.  Crystals are rare, and are up to 0.2 mm in length, subhedral and somewhat elongate with a maximum length:width ratio of 4:1.  Crystal system is orthorhombic.  Color is dark orange to reddish-orange, to yellow-orange with a yellow streak, vitreous luster, no obvious cleavage, and no fluorescence.  Terlinguacreekite is a mercury oxychloride with the chemical composition: Hg2+3O2Cl2.  Specimens are priced according to the richness of the Terlinguacreekite, not relative to the size of the Calcite matrix.  Magnification of 20-30X and often higher is required for best appreciation of the crystallization.  All specimens are co-type.  IMA approved # 2004-018.   Red arrow pointers have been affixed to all specimens to indicate the areas of interest.   Pricing is according to richness, not relative to the size of the Calcite matrix.

 

ITEM
NUMBER

SPECIMEN SIZE (INCHES)

PRICE

 

LENGTH

WIDTH

THICKNESS

 

2231

1 3/4

1 1/2

1 1/8

SOLD

 

2232

1 1/8

1 1/8

1/8

SOLD

 

2233

1 3/4

1 1/4

3/4

SOLD

 

2234

1 1/4

5/8

1/4

SOLD

 

2235

1 3/4

1 1/8

1/2

SOLD

 

2236

1 7/8

1 1/2

1 1/4

SOLD

 

2237

1/2

1/2

1/4

SOLD

 

2238

1 1/4

3/4

1/2

SOLD

 

2239

1

3/4

1/4

SOLD

 

2240

7/8

3/4

3/8

SOLD

 

2241

1 1/8

1

7/8

SOLD

 

2242

1 1/8

1

5/8

SOLD

 

2243

1 1/8

5/8

1/2

SOLD

 

2244

1 3/8

1 1/8

3/4

SOLD

 

2245

2 1/8

1 5/8

5/8

SOLD

 

2246

1 3/4

1 1/8

3/4

SOLD

 

2247

1 1/2

1 1/2

1

SOLD

 

2248

7/8

5/8

1/4

SOLD

CLICK ON SPECIMENS FOR LARGER IMAGE

Photomicrographs of Terlinguacreekite crystals


 


2231

2232

2233

2234

2235

2236

2237

2238

2239

2240

2241

2242

2243

2244

2245

2246

2247
 

2248 closeup

2248 whole specimen
 


Close-up photos were taken with a Dino-Lite digital microscope.
Field of view (FOV) is 2mm for specimens 2231 - 2248

 

COPPER, TENNANTITE
Tsumeb Mine, Tsumeb, Namibia
Two of the specimens pictured at the left are pairs, each cut from a single specimen of very high-grade ore containing masses and stringers of native Copper, with each half of the specimen polished on one surface.  Item MI-1423 is a single specimen, polished on two surfaces.  Associates noted include Tennantite, Cuprite, Mimetite (white), Goethite, Dolomite, Plancheite  Tsumcorite, Quartz, and Duftite though all associates are not present of every specimen.  These specimens would make excellent additions to any reference collection of Tsumeb minerals, with so many minerals identified in this unusual assemblage.  These specimens were obtained from Walter Kahn in the late 1970’s, and Kahn’s collection # 1263 is attached to specimen MI-1424.  Each half of the MI-1424 specimen has a thick band of metallic black Tennantite running diagonally across the wide end of the specimen.  Kahn was a German mineral collector for whom the mineral Warikahnite was named, described from Tsumeb in 1980.  The gram weight of each specimen is given below, simply as a size measurement.  The specimens are not sold by the gram.
 

ITEM
NUMBER
MI-

WEIGHT(GRAMS)

SPECIMEN SIZE
(INCHES)

SPECIMEN
PRICE

1422

5.60

3/4

1/2

3/8

$18.50 / pair

9.88

3/4

3/8

3/8

1423

91.30

1 3/8

1 1/8

1

SOLD

1424

33.88

2

1

1/2

$48.50/ pair

82.25

2 3/8

1 3/8

7/8

  
MI-1422

MI-1423

MI-1424


 

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