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0 item @ $0.00  

Mixed Minerals

Friday, 22 April 2022 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including ankerite, artinite, balangeroite, baryte, betekhtinite, and briartite and more from places like Niederschlema, Schlema dist., Erzgebirge, Saxony, Germany, Staten Island, New York City, Richmond Co., New York, United States, Poggio San Vittore Mine, Lanzo Valley, Piedmont, Italy, Elmwood mine, Smith Co., Tennessee, United States, Dzhezkazgan mine, Karagandy, Kazakhstan, and Tsumeb mine, Tsumeb, Namibia.

Ankerite

ps after Calcite - #BC52613
Locality
Niederschlema, Schlema dist., Erzgebirge, Saxony, Germany 
Formula
CaFe2+(CO3)2 
Availability
Available
Price
$175.00
Size
10 x 6 x 2.5 cm - Cabinet 
Tagged
carbonate  

An attractive specimen with tiny white rhombic crystals of Ankerite which replaced Calcite. The black specks are Hematite. It comes with two Freiberg museum labels (prov. tab) from 1992 by the Barbara and the late, highly regarded Forrest Cureton, a friend of mine.


Ankerite

Formula
CaFe2+(CO3)2 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Massive, Granular 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
brown, brownish yellow, gray, gray brown, white 
Streak
white 
Class
Trigonal - Rhombohedral 
Fracture
Sub Conchoidal 
Hardness
3.5-4 
Mineralpedia
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Previously Sold Ankerite
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Artinite

#RS57643
Locality
Staten Island, New York City, Richmond Co., New York, United States 
Formula
Mg2CO3(OH)2·3H2
Availability
Sold
Size
6 x 5 x 2.5 cm - Sm Cabinet 
Tagged
carbonate  

Crusts composed of delicate white needles on serpentinized matrix associated with minor Hydromagensite.


Artinite

Formula
Mg2CO3(OH)2·3H2
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Radial, Encrustations 
Cleavage
Perfect, Good, None 
Luster
Silky 
Color
white 
Streak
white 
Class
Monoclinic 
Fracture
Uneven 
Hardness
2.5 
Collection
RC Stamberg Collection
Mineralpedia
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Previously Sold Artinite
On Dakota Matrix
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SOLD
Balangeroite - BW58075
Balangeroite - BW58075

Balangeroite

#BW58075
Locality
Poggio San Vittore Mine, Lanzo Valley, Piedmont, Italy 
Formula
Mg21Si8O27(OH)20 
Availability
Sold
Size
4.5 x 0.1 x 0.1 cm - Miniature 
Special Info
Type Locality 

Slender golden, fibrous crystals to 4.5cm. Balangeroite is a rare inosilicate found in schistose serpentinite in proximity to a large ultramafic massif. It is a one-locality mineral.


Balangeroite

Formula
Mg21Si8O27(OH)20 
Crystal System
Monoclinic 
Crystal Habit
Fibrous 
Cleavage
Very Good, Very Good, None 
Luster
Vitreous - Greasy 
Color
brownish yellow, dark brown 
Streak
brownish white 
Class
Monoclinic - Prismatic 
Hardness
Collection
Bill Wilson Collection
Special Info
Type Locality

Baryte

on Sphalerite - #BC52707
Locality
Elmwood mine, Smith Co., Tennessee, United States 
Formula
BaSO4 
Availability
Available
Price
$125.00
Size
5.5 x 5.5 x 5.5 cm - Sm Cabinet 

Spheroidal aggregate of yellow, malformed, Baryte crystals on found at the Elmwood mine. At the base are greasy looking, dark reddish brown Sphalerite crystals to 2cm.


Baryte

Formula
BaSO4 
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Prismatic, Massive - Fibrous 
Cleavage
Perfect, Perfect, Imperfect 
Luster
Vitreous (Glassy) 
Color
white, yellowish white, grayish white, brownish white, dark brown 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Uneven 
Hardness
3-3.5 
Collection
Barbara Cureton Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Baryte
On Dakota Matrix
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Mindat
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Betekhtinite

#BW58090
Locality
Dzhezkazgan mine, Karagandy, Kazakhstan 
Formula
(Cu,Fe)21Pb2S15 
Availability
Sold
Size
4.5 x 2.5 x 2 cm - Miniature 
Tagged
sulfide , copper  

A superb Betekhtinite cluster of prismatic and heavily striated crystals to 1.7cm. 


Betekhtinite

Formula
(Cu,Fe)21Pb2S15 
Crystal System
Orthorhombic 
Crystal Habit
Acicular 
Cleavage
Distinct, Distinct, Distinct 
Luster
Metallic 
Color
brownish black 
Streak
black 
Class
Orthorhombic - Dipyramidal 
Hardness
Collection
Bill Wilson Collection

Briartite

with Tennantite & Chalcopyrite - #BW58078
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
Cu2FeGeS4 
Availability
Sold
Size
5 x 3 x 2.5 cm - Miniature 
Tagged
sulfide , copper  

Dark gray crystal grains intermixed with Chalcopyrite, Tennantite and Galena. It is hard to discern since it is probably microscoppic.


Briartite

Formula
Cu2FeGeS4 
Crystal System
Tetragonal 
Luster
Metallic 
Color
blue gray, gray, iron gray 
Class
Tetragonal - Scalenohedral 
Hardness
3.5-4 
Collection
Bill Wilson Collection

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