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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 giniite, halloysite, iron, kunatite, lazarenkoite, and londonite and more from places like Sandamap pegmatite, D�ures, Erongo, Namibia, Dragon mine, Tintic dist., Juab Co., Utah, United States, B�hl, Weimar, Kassel, Hesse, Germany, Krásno, Horní Slavkov, Bohemia, Czech Republic, Khovu-Aksy, Tuva, Siberia, Russia, and Antsongomvato mine, Betroka dist., Antananarivo, Madagascar.

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
SOLD
Halloysite - 51109
Halloysite - 51109

Halloysite

#51109
Locality
Dragon mine, Tintic dist., Juab Co., Utah, United States 
Formula
Al2(Si2O5)(OH)4 
Availability
Sold
Size
8 x 7 x 6 cm - Sm Cabinet 

Snow white mass.


Halloysite

Formula
Al2Si2O5(OH)4 
Crystal System
Monoclinic 
Crystal Habit
Earthy 
Cleavage
None, None, None 
Luster
Earthy (Dull) 
Color
white, yellowish white, reddish white, brownish white, greenish white 
Streak
white 
Class
Monoclinic - Domatic 
Fracture
Earthy 
Hardness
SOLD
Iron - 49325
Iron - 49325

Iron

#49325
Locality
B�hl, Weimar, Kassel, Hesse, Germany 
Formula
Fe 
Availability
Sold
Size
1.3 x 1.1 x 0.3 cm - Thumbnail 
Tagged
native element  

Two pieces of native Iron 1.2 and 1.3cm.


Iron

Formula
Fe 
Crystal System
Isometric 
Crystal Habit
Massive, Granular, Disseminated 
Cleavage
Perfect, Perfect, Perfect 
Luster
Metallic 
Color
iron black, dark gray, steel gray 
Streak
gray 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
4-5 
Mineralpedia
View Iron
On Dakota Matrix
Previously Sold Iron
On Dakota Matrix
Other Available Iron
WebMineral
View Iron
Mindat
View Iron

Kunatite

#50428
Locality
Krásno, Horní Slavkov, Bohemia, Czech Republic 
Formula
CuFe3+2(PO4)2(OH)2·4H2
Availability
Sold
Size
2.5 x 2 x 1.5 cm - Thumbnail 
Tagged
phosphate , copper  
Special Info
Type Locality 

Green alterations of phosphate rock. Kunatite is the copper analog of Whitmoreite. It is a two-locality mineral thus far, according to Mindat.org. This locality is a greisen deposit mined for tin and tungsten. Over 100 minerals have been identified at this locality.


Kunatite

Formula
CuFe3+2(PO4)2(OH)2·4H2
Crystal System
Monoclinic 
Class
Monoclinic - Prismatic 
Hardness
Special Info
Type Locality
Mineralpedia
View Kunatite
On Dakota Matrix
Previously Sold Kunatite
On Dakota Matrix
Other Available Kunatite
WebMineral
View Kunatite
Mindat
View Kunatite

Lazarenkoite

#50481
Locality
Khovu-Aksy, Tuva, Siberia, Russia 
Formula
CaFe3+As3+3O7·3H2
Availability
Sold
Size
1.3 x 1.0 x 0.5 cm - Thumbnail 
Special Info
Type Locality 

Bright orange fibrous crystals. Lazarenkoite is a three locality mineral according to Mindat. Identified by Dr. Igor Pekov.


Lazarenkoite

Formula
CaFe3+As3+3O7·3H2
Crystal System
Orthorhombic 
Crystal Habit
Fibrous, Encrustations 
Luster
Resinous 
Color
light orange 
Streak
light yellow 
Class
Orthorhombic 
Hardness
Special Info
Type Locality

Londonite

with Muscovite - #48444
Locality
Antsongomvato mine, Betroka dist., Antananarivo, Madagascar 
Formula
CsBe5Al4B11O28 
Availability
Sold
Size
4.5 x 4 x 3 cm - Miniature 
Tagged
beryllium , pegmatite mineral  

Superb pale green Londonite crystal to 1.1cm with several smaller crystals nestled nicely in Muscovite crytsals.  North Star Minerals tag stating that it was in the collection of Dr. David London and acquired by Dr. Fredic Pezzotta. Very Rare.


Londonite

Formula
CsBe5Al4B11O28 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, white, yellow 
Streak
white 
Class
Isometric - Hextetrahedral 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Ex. Dr. David London
Mineralpedia
View Londonite
On Dakota Matrix
Previously Sold Londonite
On Dakota Matrix
Other Available Londonite
WebMineral
View Londonite
Mindat
View Londonite

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