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0 item @ $0.00  

Mixed Minerals

Sunday, 28 June 2020 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including sphalerite, spinel, stibnite, sylvanite, torbernite, and uraninite and more from places like Madan dist, Rhodope Mts, Smolyan Oblast, Bulgaria, Lime Crest quarry, Franklin Marble, Sussex County, New Jersey, United States, Cavnic, Maramures Co., Romania, Cripple Creek dist., Teller Co., Colorado, United States, Pitch mine, Saguache Co., Colorado, United States, and Wood mine, Central City dist., Gilpin Co., Colorado, United States.

Sphalerite

#AH53617
Locality
Madan dist, Rhodope Mts, Smolyan Oblast, Bulgaria 
Formula
ZnS 
Availability
Sold
Size
4 x 3.5 x 1.5 cm - Miniature 
Tagged
sulfide  

Translucent green Sphalerite crystals to 3mm.


Sphalerite

Formula
ZnS 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals, Granular, Colloform 
Cleavage
Perfect, Perfect, Perfect 
Luster
Resinous - Greasy 
Color
brown, yellow, red, green, black 
Streak
brownish white 
Class
Isometric - Hextetrahedral 
Fracture
Uneven 
Hardness
3.5-4 
Collection
Arnold G Hampson Collection

Spinel

with Chondrodite in Calcite - #AH53608
Locality
Lime Crest quarry, Franklin Marble, Sussex County, New Jersey, United States 
Formula
MgAl2O4 
Availability
Available
Price
$50.00
Size
6 x 5.5 x 6 cm - Sm Cabinet 

White Calcite matrix with accessory minerals of black Spinel (1-3mm), red Chodrodite (9mm) and Phlogopite mica.


Spinel

Formula
MgAl2O4 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals, Massive - Granular 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, red, blue, green, brown 
Streak
grayish white 
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Spinel
On Dakota Matrix
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Stibnite

on Baryte - #AH53614
Locality
Cavnic, Maramures Co., Romania 
Formula
Sb2S3 
Availability
Available
Price
$50.00
Size
9 x 3.5 x 3.5 cm - Sm Cabinet 
Tagged
sulfide  

Tiny, less than 1mm, Stibnite crystals crowning or rimming colorless Baryte crystals. 


Stibnite

Formula
Sb2S3 
Crystal System
Orthorhombic 
Crystal Habit
Prismatic, Striated, Granular 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
lead gray, bluish lead gray, steel gray, black 
Streak
blackish gray 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
View Stibnite
On Dakota Matrix
Previously Sold Stibnite
On Dakota Matrix
Other Available Stibnite
WebMineral
View Stibnite
Mindat
View Stibnite

Sylvanite

#53602
Locality
Cripple Creek dist., Teller Co., Colorado, United States 
Formula
AgAuTe4 
Availability
Sold
Size
6.5 x 4 x 3 cm - Sm Cabinet 
Tagged
tellurium , silver , gold  

Very rich specimen with bladed and slightly striated Sylvanite crystals to 5mm long filling crevices in drusy Quartz matrix. Minor amounts of Pyrite and unidetified silvery mineral.


Sylvanite

Formula
AgAuTe4 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Skeletal, Platy 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
yellowish silver white, white 
Streak
steel gray 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
1.5-2 
Mineralpedia
View Sylvanite
On Dakota Matrix
Previously Sold Sylvanite
On Dakota Matrix
Other Available Sylvanite
WebMineral
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Mindat
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SOLD
Torbernite - AH53619
Torbernite - AH53619

Torbernite

#AH53619
Locality
Pitch mine, Saguache Co., Colorado, United States 
Formula
Cu(UO2)2(PO4)2·12H2
Availability
Sold
Size
4 x 3.5 x 3 cm - Miniature 
Tagged
phosphate , copper  

I thought just in case there was a collector out there looking for a reprentative Torbernite specimen, I would post it, knowing full well that there is not such a collector. But you never know. So here it is: Torbernite crystals small enough I can't measure them.


Torbernite

Formula
Cu(UO2)2(PO4)2·12H2
Crystal System
Tetragonal 
Crystal Habit
Tabular, Earthy, Foliated 
Cleavage
Perfect, Distinct, None 
Luster
Vitreous - Pearly 
Color
green, grass green, leek green, apple green, siskin green 
Streak
pale green 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Brittle 
Hardness
2-2.5 
Collection
Arnold G Hampson Collection

Uraninite

with Pyrite - #53560
Locality
Wood mine, Central City dist., Gilpin Co., Colorado, United States 
Formula
UO2 
Availability
Sold
Size
6 x 4 x 2.5 cm - Sm Cabinet 
Special Info
Radioactive!! 

The specimen is sawed flat on two sides and shows the black formless masses of dull black uraninite. It is interesting to study. The Uraninite looks as though it impregnated and/or perhaps replaces the Pyrite or just cements the brecciated rock. Yes it is hot and will be wrapped in lead foil for shipping adding to the cost.


Uraninite

Formula
UO2 
Crystal System
Isometric 
Crystal Habit
Crystalline - Coarse, Botryoidal, Dendritic 
Cleavage
Good, None, None 
Luster
Sub Metallic 
Color
brownish black, gray, grayish black, black 
Streak
brownish black 
Class
Isometric - Hexoctahedral 
Fracture
Brittle - Conchoidal 
Hardness
5-6 
Special Info
Radioactive!!

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