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Mixed Minerals

Friday, 17 January 2020 07:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including bertrandite, bournonite, carnotite, crocoite, ferberite, and grossular and more from places like Beryl Mountain mine, South Acworth, Sullivan Co., New Hampshire, United States, Ancash dept., Peru, Channel 3A, Gouldings Well, Navajo Co., Arizona, United States, Dundas Ext. mine, Dundas, Zeehan, Tasmania, Australia, Yaogangxian mine, Chenzhou, Hunan prov., China, and Coahuila, Mexico.

Bertrandite

#AH52192
Locality
Beryl Mountain mine, South Acworth, Sullivan Co., New Hampshire, United States 
Formula
Be4Si2O7(OH)2 
Availability
Sold
Size
6 x 5 x 2.5 cm - Sm Cabinet 
Tagged
beryllium , pegmatite mineral  

Colorless, large plates of Bertrandite to 6mm in matrix. Rich. Collected in 1947.


Bertrandite

Formula
Be4Si2O7(OH)2 
Crystal System
Orthorhombic 
Crystal Habit
Crystalline - Fine, Tabular, Prismatic 
Cleavage
Perfect, Distinct, Distinct 
Luster
Vitreous (Glassy) 
Color
colorless, pale yellow 
Streak
white 
Class
Orthorhombic - Pyramidal 
Fracture
Brittle 
Hardness
6-7 
Collection
Arnold G Hampson Collection

Bournonite

with Chalcopyrite - #AH52189
Locality
Ancash dept., Peru 
Formula
CuPbSbS3 
Availability
Sold
Size
7 x 6 x 3 cm - Sm Cabinet 
Tagged
sulfide , copper  

Stubby, silvery, and heavily striated Bournonite crystals to 4mm associated with good crystals Chalcopyrite. Some of the Chalcopyrite is coating over large Tetrahedrite crystals. The matrix is Galena.


Bournonite

Formula
CuPbSbS3 
Crystal System
Orthorhombic 
Crystal Habit
Platy, Pseudo Cubic, Cog-wheel 
Cleavage
Imperfect, None, None 
Luster
Metallic 
Color
gray, black, steel gray 
Streak
gray 
Class
Orthorhombic - Dipyramidal 
Fracture
Sub Conchoidal 
Hardness
Collection
Arnold G Hampson Collection

Carnotite

#AH52197
Locality
Channel 3A, Gouldings Well, Navajo Co., Arizona, United States 
Formula
K2(UO2)2(VO4)2·3H2
Availability
Available
Price
$40.00
Size
4 x 4 x 1.5 cm - Miniature 
Special Info
Radioactive!! 

Exceptional canary yellow, opaque crystals to about 0.3mm as singles and in groups. Very nice.


Carnotite

Formula
K2(UO2)2(VO4)2·3H2
Crystal System
Monoclinic 
Crystal Habit
Earthy, Encrustations, Platy 
Cleavage
Perfect, None, None 
Luster
Pearly 
Color
yellow, golden yellow, greenish yellow 
Streak
light yellow 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
Collection
Arnold G Hampson Collection
Special Info
Radioactive!!

Crocoite

#AH52185
Locality
Dundas Ext. mine, Dundas, Zeehan, Tasmania, Australia 
Formula
PbCrO4 
Availability
Available
Price
$125.00
Size
6 x 6 x 2.5 cm - Sm Cabinet 

Great reddish orange tabular crystals of Crocoite. Coverage on both sides. Stunning specimen.


Crocoite

Formula
PbCrO4 
Crystal System
Monoclinic 
Crystal Habit
Crystalline - Coarse, Massive - Granular, Acicular 
Cleavage
Distinct, Indistinct, Indistinct 
Luster
Adamantine 
Color
yellow, orange, red, red orange 
Streak
yellowish orange 
Class
Monoclinic - Prismatic 
Fracture
Sectile 
Hardness
2.5-3 
Collection
Arnold G Hampson Collection
Mineralpedia
View Crocoite
On Dakota Matrix
Previously Sold Crocoite
On Dakota Matrix
Other Available Crocoite
WebMineral
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Mindat
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Ferberite

(wolframite series) - #52188
Locality
Yaogangxian mine, Chenzhou, Hunan prov., China 
Formula
Fe2+WO4 
Availability
Sold
Size
7 x 5 x 1.5 cm - Sm Cabinet 

Black, shiny, striated crystals of Ferberite (at least within the wolframite series). The largest crystal is 4cm. The 2-3mm tabular crystals are yellowish 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
View Ferberite
On Dakota Matrix
Previously Sold Ferberite
On Dakota Matrix
Other Available Ferberite
WebMineral
View Ferberite
Mindat
View Ferberite

Grossular

garnet - #AH52145
Locality
Coahuila, Mexico 
Formula
Ca3Al2(SiO4)3 
Availability
Available
Price
$125.00
Size
7.5 x 3.5 x 3 cm - Sm Cabinet 

"Raspberry" red crystals of Grossular garnet in nice grouping. The largest crystal is 1cm.


Grossular

Collection
Arnold G Hampson Collection

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