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Rare Minerals for Sale

Saturday, 23 November 2019 04:00 PM

Introducing the "Rare Minerals for Sale" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including copper, creedite, elbaite, ferberite, and goethite and more from places like Conglomerate Lode, Lake Superior, Michigan, United States, Liberty (Hall) mine, Nye Co., Nevada, United States, Black Mountain pegmatite, Rumford, Oxford Co., Maine, United States, Yaogangxian mine, Chenzhou, Hunan prov., China, Lower Rambler mine, Beaver Creek dist., Boulder Co., Colorado, United States, and Lower Mesabi Range, Itasca Co., Minnesota, United States.

Copper

#AH51787
Locality
Conglomerate Lode, Lake Superior, Michigan, United States 
Formula
Cu 
Availability
Available
Price
$275.00
Size
17 x 9 x 5 cm - Cabinet 
Tagged
native element  

Beautiful Copper specimen crystallized in-between conglomerate rock. 


Copper

Formula
Cu 
Crystal System
Isometric 
Crystal Habit
Nodular, Arborescent 
Cleavage
None, None, None 
Luster
Metallic 
Color
brown, copper red, light pink, red 
Streak
rose 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
Collection
Arnold G Hampson Collection
Mineralpedia
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Creedite

#AH51796
Locality
Liberty (Hall) mine, Nye Co., Nevada, United States 
Formula
Ca3Al2(SO4)(OH)2F8·2H2
Availability
Available
Price
$125.00
Size
4.5 x 4.5 x 2.5 cm - Miniature 

Lilac colored sharp Creedite crystals to 3mm, but mostly 1-2mm. Excellent specimen.


Creedite

Formula
Ca3Al2(SO4)(OH)2F8·2H2
Crystal System
Monoclinic 
Crystal Habit
Granular, Radial, Prismatic 
Cleavage
Perfect, None, None 
Luster
Vitreous - Greasy 
Color
colorless, violet, white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
3.5 
Collection
Arnold G Hampson Collection
Mineralpedia
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Other Available Creedite
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Elbaite

var. rubellite - #AH51815
Locality
Black Mountain pegmatite, Rumford, Oxford Co., Maine, United States 
Formula
Na(Al1.5Li1.5)Al6(BO3)3Si6O18(OH)4 
Availability
Sold
Size
9 x 4 x 5.5 cm - Sm Cabinet 
Tagged
pegmatite mineral  

Large dark red tourmaline crystal which multiple fractures rehealed with Quartz or Albite. Really neat specimen.

Collected in 1945 by Arnold Hampson. Read Hampson's bio here.


Elbaite

Formula
Na(Al1.5Li1.5)Al6(BO3)3Si6O18(OH)4 
Crystal System
Trigonal 
Crystal Habit
Striated, Prismatic 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
blue, colorless, green, yellow, white 
Streak
white 
Class
Trigonal - Ditrigonal Pyramidal 
Fracture
Sub Conchoidal 
Hardness
7.5 
Collection
Arnold G Hampson Collection
Mineralpedia
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Ferberite

with Arsenopyrite & Fluorite - #AH51821
Locality
Yaogangxian mine, Chenzhou, Hunan prov., China 
Formula
Fe2+WO4 
Availability
Sold
Size
8.5 x 5 x 4 cm - Sm Cabinet 

This is really one to be appreciated once in hand though, you will be amazed at the degree of how well crystallized every mineral is. The Fluorite is to about 3mm with purple cores and the Ferberite is large and lustrous to 2.2cm. The brown crystals are actually excellent, thick crystals of Muscovite.


Ferberite

Formula
Fe2+WO4 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Lamellar, Massive - Granular 
Cleavage
Perfect, Parting, Parting 
Luster
Sub Metallic 
Color
black 
Streak
brownish black 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness
4.5 
Collection
Arnold G Hampson Collection
Mineralpedia
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On Dakota Matrix
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On Dakota Matrix
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Ferberite

#AH51828
Locality
Lower Rambler mine, Beaver Creek dist., Boulder Co., Colorado, United States 
Formula
Fe2+WO4 
Availability
Sold
Size
9 x 5 x 3.5 cm - Sm Cabinet 
Tagged
tungsten  

Does not look like much of a specimen, but under the scope there are hundreds of black, lustrous, tabular crystals to around 1mm.

The Lower Rambler was a tungsten mine in the early 1900's and was a substantial producer after the tungsten was discovered in the Nederland area in 1899. The mine sits at an elevation of 8,575ft. It is described in various USGS reports, which describes the Ferberite crystals occuring in "horn" breccia and sheeted granite. The Nederland area during the early 1900's was considered the most important ferberite-producing district in the world. It is centered around Nederland in Boulder county in scattered deposits and is roughly 4 to 5 miles wide and 10-12 in length.  

Hampson self-collected this specimen in 1963. This may be described as a "legacy" specimen.

Read Hampson's bio here.


Ferberite

Formula
Fe2+WO4 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Lamellar, Massive - Granular 
Cleavage
Perfect, Parting, Parting 
Luster
Sub Metallic 
Color
black 
Streak
brownish black 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness
4.5 
Collection
Arnold G Hampson Collection
Mineralpedia
View Ferberite
On Dakota Matrix
Previously Sold Ferberite
On Dakota Matrix
Other Available Ferberite
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Mindat
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Goethite

#AH51850
Locality
Lower Mesabi Range, Itasca Co., Minnesota, United States 
Formula
FeO(OH) 
Availability
Sold
Size
8 x 5 x 2.5 cm - Sm Cabinet 

An ore specimen of Goethite with a band or seam of Goethite across the face and glistening crystals, which resemble Manganite, on the other half. 

Goethite forms from weathering of primary iron ores like magnetite and pyrite, which involves oxidizing ferrous iron to ferric (Fe III) iron. It contains roughly 63% iron. It typically occurs in Banded Iron Formations (BIF's) in the iron ranges of Minnesota. The Mesabi Range is one the major iron ranges in upper Minnesota, which has produced amazing specimens of Goethite and many other iron minerals. Iron ore deposits were first discoverd in 1844 in the Marquete Range and later in the Mesabi Range in 1866. Ore was first mined in 1890 in the Mesabi Range.


Goethite

Formula
FeO(OH) 
Crystal System
Orthorhombic 
Crystal Habit
Acicular, Reniform, Radial 
Cleavage
Perfect, Distinct, None 
Luster
Adamantine - Silky 
Color
brown, reddish brown, yellowish brown, brownish yellow, ocher yellow 
Streak
yellowish brown 
Class
Orthorhombic - Dipyramidal 
Fracture
Hackly 
Hardness
5-5.5 
Collection
Arnold G Hampson Collection
Mineralpedia
View Goethite
On Dakota Matrix
Previously Sold Goethite
On Dakota Matrix
Other Available Goethite
WebMineral
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Mindat
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