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Recently Released New Additions

Rare & Systematic Minerals

Sunday, 07 May 2023 04:00 PM

Introducing the "Rare & Systematic Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including magnesiohulsite, orientite, schieffelinite, warikahnite, wenkite, and wilkinsonite and more from places like Iten'yurginskoye dep., Chukotsky, Russia, Manganese mine, Copper Harbor, Keweenaw Co., Michigan, United States, Grand Central mine, Tombstone, Cochise Co., Arizona, United States, Plaka mines, Lavrion dist., East Attica, Attica, Greece, Candoglia, Mergozzo, Piedmont, Italy, and Warrumbungle Volcano, Gowen Co., New South Wales, Australia.

Magnesiohulsite - BAC61613
Magnesiohulsite - BAC61613

Magnesiohulsite

#BAC61613
Locality
Iten'yurginskoye dep., Chukotsky, Russia 
Formula
Mg2(Fe3+,Sn,Mg)O2(BO3) 
Availability
Available
Price
$225.00
Size
1 x 0.5 x 0.5 cm - Thumbnail 
Tagged
tin  

Magnesiohulsite is a very rare tin borate found a three localites. The crystals are compact, radial fibers.


Magnesiohulsite

Formula
Mg2(Fe3+,Sn,Mg)O2(BO3) 
Crystal System
Monoclinic 
Crystal Habit
Aggregates, Microscopic Crystals, Acicular 
Cleavage
None, None, None 
Luster
Sub Metallic 
Color
black 
Streak
dark brown 
Class
Monoclinic - Prismatic 
Hardness
5.5-6.5 
Collection
William & Anne Cook Collection
On Dakota Matrix
Previously Sold Magnesiohulsite
On Dakota Matrix
Other Available Magnesiohulsite
WebMineral
View Magnesiohulsite
Mindat
View Magnesiohulsite
Orientite - BAC61624
Orientite - BAC61624

Orientite

with Braunite - #BAC61624
Locality
Manganese mine, Copper Harbor, Keweenaw Co., Michigan, United States 
Formula
Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10·4H2O 
Availability
Available
Price
$95.00
Size
2 x 1.5 x 1.5 cm - Thumbnail 

Rusty red tiny tabular crystals. Rich and excellent specimen.


Orientite

Formula
Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10·4H2O 
Crystal System
Orthorhombic 
Crystal Habit
Radial, Prismatic 
Cleavage
Indistinct, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
brown, black 
Streak
brown 
Class
Orthorhombic - Dipyramidal 
Hardness
4-5 
Collection
William & Anne Cook Collection
Mineralpedia
View Orientite
On Dakota Matrix
Previously Sold Orientite
On Dakota Matrix
Other Available Orientite
WebMineral
View Orientite
Mindat
View Orientite
Schieffelinite - BAC61626
Schieffelinite - BAC61626

Schieffelinite

#BAC61626
Locality
Grand Central mine, Tombstone, Cochise Co., Arizona, United States 
Formula
PbTeO4·H2O 
Availability
Available
Price
$150.00
Size
1.4 x 1.4 x 1 cm - Thumbnail 
Tagged
tellurium  
Special Info
Type Locality 

White Schieffelinite with green Rodalquilarite. Very rare.


Schieffelinite

Formula
PbTeO4·H2O 
Crystal System
Orthorhombic 
Crystal Habit
Platy, Scaly 
Cleavage
Good, None, None 
Luster
Adamantine 
Color
colorless, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Hardness
2 
Collection
William & Anne Cook Collection
Special Info
Type Locality
On Dakota Matrix
Previously Sold Schieffelinite
On Dakota Matrix
Other Available Schieffelinite
WebMineral
View Schieffelinite
Mindat
View Schieffelinite
Warikahnite - BAC61620
Warikahnite - BAC61620

Warikahnite

#BAC61620
Locality
Plaka mines, Lavrion dist., East Attica, Attica, Greece 
Formula
Zn3(AsO4)2·2H2O 
Availability
Available
Price
$295.00
Size
2.5 x 1.5 x 1 cm - Thumbnail 
Tagged
arsenate  

Extremely rare zinc arsenate forming white acicular crystals less o.3mm.


Warikahnite

Formula
Zn3(AsO4)2·2H2O 
Crystal System
Triclinic 
Crystal Habit
Acicular, Radial 
Cleavage
Perfect, Good, Good 
Luster
Vitreous (Glassy) 
Color
colorless, honey yellow, light yellow, orange 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle 
Hardness
2 
Collection
William & Anne Cook Collection
On Dakota Matrix
Previously Sold Warikahnite
On Dakota Matrix
Other Available Warikahnite
WebMineral
View Warikahnite
Mindat
View Warikahnite
Wenkite - 61600
Wenkite - 61600

Wenkite

#61600
Locality
Candoglia, Mergozzo, Piedmont, Italy 
Formula
Ba4Ca6(Si,Al)20O41(OH)2(SO4)3·H2O 
Availability
Available
Price
$95.00
Size
4 x 4 x 2.7 cm - Miniature 
Special Info
Type Locality 

Wenkite, a zeolite, is found in only three worldwide localites. This is the type locality. Wenkite is formed in baryte lavers in calc-silicate rocks a product of metamorphosed marbles.


Wenkite

Formula
Ba4Ca6(Si,Al)20O41(OH)2(SO4)3·H2O 
Crystal System
Hexagonal 
Crystal Habit
Columnar 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
light gray 
Streak
white 
Class
Hexagonal - Ditrigonal Dipyramidal 
Fracture
Brittle 
Hardness
6 
Collection
William & Anne Cook Collection
Special Info
Type Locality
On Dakota Matrix
Previously Sold Wenkite
On Dakota Matrix
Other Available Wenkite
WebMineral
View Wenkite
Mindat
View Wenkite
Wilkinsonite - BAC61605
Wilkinsonite - BAC61605

Wilkinsonite

#BAC61605
Locality
Warrumbungle Volcano, Gowen Co., New South Wales, Australia 
Formula
Na4(Fe2+8Fe3+4)O4[Si12O36] 
Availability
Available
Price
$65.00
Size
6 x 4.5 x 2 cm - Sm Cabinet 
Special Info
Type Locality 

Wilkinsonite occurs in eruptive peralkaline trachytes and forms a series with aenigmatite. You can't see this mineral even with a microscope as it forms black grains less than 50 microns. In association is a host of other minerals including probable anorthoclase, sodalite, clinopyroxenes, nepheline, analcime, arfvedsonite. Wilkinsonite occurs in only 5 localities worldwide, one of these is from a meteorite.


Wilkinsonite

Formula
Na4(Fe2+8Fe3+4)O4[Si12O36] 
Crystal System
Triclinic 
Luster
Vitreous (Glassy) 
Color
black 
Streak
brown 
Class
Triclinic - Pinacoidal 
Hardness
5 
Collection
William & Anne Cook Collection
Special Info
Type Locality
On Dakota Matrix
Previously Sold Wilkinsonite
On Dakota Matrix
Other Available Wilkinsonite
WebMineral
View Wilkinsonite
Mindat
View Wilkinsonite

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