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Rare Mineral Species

Friday, 09 August 2019 06:30 PM

Introducing the "Rare Mineral Species" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including analcime, autunite, calzirtite, columbite-(fe), emmonsite, and giniite and more from places like Croft quarry, Croft, Blaby, Leicestershire, England, Saint-Symphorien, near Autun, Saône-et-Loire, Burgundy, France, Jacupiranga mine, Cajati, São Paulo, Brazil, Lubilokwi, Maniema, Democratic Republic of Congo, Bambolla mine, Moctezuma, Sonora, Mexico, and Sandamap pegmatite, D�ures, Erongo, Namibia.

Analcime

with Illite - #50290
Locality
Croft quarry, Croft, Blaby, Leicestershire, England 
Formula
Na(Si2Al)O6·H2
Availability
Sold
Size
13 x 7.5 x 6 cm - Cabinet 

Good, pink Analcime crystals to 3mm in clusters on white Illit.


Analcime

Formula
Na(Si2Al)O6·H2
Crystal System
Triclinic 
Crystal Habit
Euhedral Crystals, Granular, Massive 
Cleavage
Indistinct, Indistinct, Indistinct 
Luster
Vitreous (Glassy) 
Color
white, grayish white, greenish white, yellowish white, reddish white 
Streak
white 
Class
Triclinic - Pedial 
Fracture
Sub Conchoidal 
Hardness
Mineralpedia
View Analcime
On Dakota Matrix
Previously Sold Analcime
On Dakota Matrix
Other Available Analcime
WebMineral
View Analcime
Mindat
View Analcime

Autunite

#51103
Locality
Saint-Symphorien, near Autun, Saône-et-Loire, Burgundy, France 
Formula
Ca(UO2)2(PO4)2·10-12H2
Availability
Available
Price
$350.00
Size
6 x 4.5 x 3 cm - Sm Cabinet 
Tagged
phosphate  

Bright, vivid yellow plates and rosttes of Autunite from type locality.


Autunite

Formula
Ca(UO2)2(PO4)2·10-12H2
Crystal System
Tetragonal 
Crystal Habit
Tabular, Micaceous, Foliated 
Cleavage
Perfect, Poor, Poor 
Luster
Vitreous - Pearly 
Color
yellow, pale yellow, lemon yellow, greenish yellow, pale green 
Streak
pale yellow 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Uneven 
Hardness
2-2.5 
Collection
Don Phillips Collection
Mineralpedia
View Autunite
On Dakota Matrix
Previously Sold Autunite
On Dakota Matrix
Other Available Autunite
WebMineral
View Autunite
Mindat
View Autunite

Calzirtite

#32058
Locality
Jacupiranga mine, Cajati, São Paulo, Brazil 
Formula
Ca2Zr5Ti2O16 
Availability
Sold
Size
3.5 x 2.5 x 1.2 cm - Miniature 

Black crystal grains to 1mm with Phlogopite.


Calzirtite

Formula
Ca2Zr5Ti2O16 
Crystal System
Orthorhombic 
Cleavage
Good, None, None 
Luster
Adamantine - Greasy 
Color
brown green, light brown, light green, dark brown, black brown 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
6-7 

Columbite-(Fe)

#50424
Locality
Lubilokwi, Maniema, Democratic Republic of Congo 
Formula
Fe2+Nb2O6 
Availability
Sold
Size
2.1 x 2.4 x 0.6 cm - Thumbnail 

Single, tabular crystal with two good faces and beveled terminations.


Columbite-(Fe)

Formula
Fe2+Nb2O6 
Crystal System
Orthorhombic 
Crystal Habit
Massive - Granular, Striated 
Cleavage
Distinct, None, None 
Luster
Sub Metallic 
Color
black, brownish black 
Streak
blackish brown 
Class
Orthorhombic - Dipyramidal 
Fracture
Sub Conchoidal 
Hardness
SOLD
Emmonsite - 51092
Emmonsite - 51092

Emmonsite

#51092
Locality
Bambolla mine, Moctezuma, Sonora, Mexico 
Formula
Fe3+2(Te4+O3)3·2H2
Availability
Sold
Size
5 x 2.5 x 4 cm - Miniature 
Tagged
tellurium  

Green crystallized crusts.


Emmonsite

Formula
Fe3+2(Te4+O3)3·2H2
Crystal System
Triclinic 
Crystal Habit
Mammillary 
Cleavage
Perfect, None, None 
Luster
Vitreous - Dull 
Color
yellow, greenish yellow 
Class
Triclinic - Pinacoidal 
Hardness
2-2.5 
Mineralpedia
View Emmonsite
On Dakota Matrix
Previously Sold Emmonsite
On Dakota Matrix
Other Available Emmonsite
WebMineral
View Emmonsite
Mindat
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Giniite

#51096
Locality
Sandamap pegmatite, D�ures, Erongo, Namibia 
Formula
Fe2+Fe3+4(PO4)4(OH)2·2H2
Availability
Available
Price
$95.00
Size
Micromount 
Tagged
phosphate , pegmatite mineral  
Special Info
Type Locality 

A micromount with a 1cm specimen showing crystalline black grains of which is the Giniite. Very Rare


Giniite

Formula
Fe2+Fe3+4(PO4)4(OH)2·2H2
Crystal System
Monoclinic 
Crystal Habit
Crystalline - Fine 
Cleavage
None, None, None 
Luster
Vitreous - Greasy 
Color
blackish brown, black, blackish green 
Streak
olive green 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
3-4 
Special Info
Type Locality
On Dakota Matrix
Previously Sold Giniite
On Dakota Matrix
Other Available Giniite
WebMineral
View Giniite
Mindat
View Giniite

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