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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, gold, raguinite, romeite, and sellaite and more from places like Niederschlema, Schlema dist., Erzgebirge, Saxony, Germany, Harvard mine, Jamestown, Tuolumne Co., California, United States, Allchar, Roszdan, Macedonia, Schneeberg dist., Erzgebirge, Saxony, Germany, and Fontsante mine, Tanneron, Var, Provence-Alpes-Côte d'Azur, France.

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 
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Gold

in Quartz - #58150
Locality
Harvard mine, Jamestown, Tuolumne Co., California, United States 
Formula
Au 
Availability
Available
Price
$1,250.00
Size
1.8 x 2.2 x 2 cm - Thumbnail 
Tagged
native element  

Choice specimen from this classical locality, which has always produced fine specimens. This one has a large Gold leaf to 1.8cm perched perfectly on Quartz. Sadly this locality is done in it's present position.


Gold

Formula
Au 
Crystal System
Isometric 
Crystal Habit
Arborescent, Platy, Granular 
Cleavage
None, None, None 
Luster
Metallic 
Color
yellow, pale yellow, orange, yellow white, reddish white 
Streak
yellow 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
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Gold

#58153
Locality
Harvard mine, Jamestown, Tuolumne Co., California, United States 
Formula
Au 
Availability
Available
Price
$1,000.00
Size
2.5 x 1 x 1 cm - Thumbnail 
Tagged
native element  

A fantastic specimen of vein Gold in leaf form. It's a very nice specimen from this classic Californai locality.


Gold

Formula
Au 
Crystal System
Isometric 
Crystal Habit
Arborescent, Platy, Granular 
Cleavage
None, None, None 
Luster
Metallic 
Color
yellow, pale yellow, orange, yellow white, reddish white 
Streak
yellow 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
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Raguinite

#58193
Locality
Allchar, Roszdan, Macedonia 
Formula
TlFeS2 
Availability
Available
Price
$295.00
Size
1 x 0.8 x 0.6 cm - Thumbnail 
Tagged
sulfide  
Special Info
Type Locality 

A small specimen of mostly Reagar with tiny brownzy crystals near the arrow and to the right. with high magnification, you will see two excellent crystals and several much smaller. It is an exceptionally rare thalium sulfide found in four places worldwide.


Raguinite

Formula
TlFeS2 
Crystal System
Orthorhombic 
Crystal Habit
Microscopic Crystals, Pseudo Hexagonal 
Cleavage
None, None, None 
Luster
Metallic 
Color
bronze 
Class
Orthorhombic 
Hardness
Special Info
Type Locality

Romeite

var. schneebergite (Oxyplumboroméite) - #BC52615
Locality
Schneeberg dist., Erzgebirge, Saxony, Germany 
Formula
Pb2Sb2O6O to (Ca,Na,◻)2Sb25+(O,OH)6
Availability
Available
Price
$250.00
Size
7 x 5 x 3 cm - Sm Cabinet 
Special Info
Antique Specimen 

Romeite is an old name, the new IMA mineral name is Oxyplumboroméite. It is basically a lead-antimony oxide. This is an antique specimen from the Vienna Museum. It carries an old label when they called is schneebergite (sse prov tab). The "Romeite" aka Oxyplumboroméite is in an area of 1 x 1.5cm and is a yellow pulverulent coating. It is associated with Sphalerite.


Romeite

Formula
(Ca,Fe++,Mn,Na)2(Sb,Ti)2O6(O,OH,F) 
Crystal System
Isometric 
Crystal Habit
Encrustations, Pulverulent 
Cleavage
Imperfect, Imperfect, Imperfect 
Luster
Vitreous - Greasy 
Color
white, yellow, yellowish brown 
Streak
brownish yellow 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
5.5-6 
Special Info
Antique Specimen
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Sellaite

#57857
Locality
Fontsante mine, Tanneron, Var, Provence-Alpes-Côte d'Azur, France 
Formula
MgF2 
Availability
Available
Price
$25.00
Size
5 x 4 x 2.5 cm - Miniature 

Massive white Sellaite, a simple Mangnesium fluoride.


Sellaite

Formula
MgF2 
Crystal System
Tetragonal 
Crystal Habit
Prismatic 
Cleavage
Distinct, Distinct, None 
Luster
Vitreous - Greasy 
Color
colorless, white 
Streak
white 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
5-6 
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