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Rare Minerals

Sunday, 09 January 2022 06:00 PM

Introducing the "Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including tadzhikite-(ce), tellurobismuthite, tlapallite, villiaumite, wadeite, and wroewolfeite and more from places like Dara-Pioz Glacier, Alayskiy Range, Tien Shan Mts, Tajikistan, Mångfallberget, Boliden, Skellefte dist., Skellefteå, Västerbotten Co., Sweden, Lucky Cuss mine, Tombstone, Cochise Co., Arizona, United States, Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada, Kirovskii mine, Kukisvumchorr Mt., Khibiny Massif, Kola Peninsula, Russia, and Manhan mines, Easthampton, Hampshire Co., Massachusetts, United States.

Tadzhikite-(Ce)

with Pyrochlore - #BW57269
Locality
Dara-Pioz Glacier, Alayskiy Range, Tien Shan Mts, Tajikistan 
Formula
Ca4Ce3+2TiB4Si4O22(OH)2 
Availability
Sold
Size
5.5 x 3.5 x 3 cm - Sm Cabinet 
Tagged
REE mineral  

A 5mm brown plate of Tadzhikite-(Ce) with black Pyrochlore group memebr and thick, pink plates of Sogdianite.


Tadzhikite-(Ce)

Formula
Ca4Ce3+2TiB4Si4O22(OH)2 
Crystal System
Monoclinic 
Cleavage
Distinct, None, None 
Luster
Vitreous (Glassy) 
Color
gray brown, reddish brown 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
Collection
Bill Wilson Collection

Tellurobismuthite

#BW57379
Locality
Mångfallberget, Boliden, Skellefte dist., Skellefteå, Västerbotten Co., Sweden 
Formula
Bi2Te3 
Availability
Sold
Size
5 x 4 x 1 cm - Miniature 
Tagged
tellurium  

It is hard to see in the photos, but the specimen is very rich in Tellurobismuthite. The mineral appears a bit brassy and tarnished from exposure but silvery when fresh.


Tellurobismuthite

Formula
Bi2Te3 
Crystal System
Trigonal 
Crystal Habit
Massive - Fibrous, Platy 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
pale gray 
Streak
lead gray 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Flexible 
Hardness
1.5-2 
Collection
Bill Wilson Collection

Tlapallite

#BW57294
Locality
Lucky Cuss mine, Tombstone, Cochise Co., Arizona, United States 
Formula
H6Ca2Cu3SO4(Te4+O3)4(Te6+O6
Availability
Available
Price
$85.00
Size
5 x 3 x 2 cm - Miniature 
Tagged
copper , tellurium  

A rich specimen for this pastel green, very rare copper tellurate. It is only found at 5 or 6 localities.


Tlapallite

Formula
H6Ca2Cu3SO4(Te4+O3)4(Te6+O6
Crystal System
Monoclinic 
Crystal Habit
Thin, Encrustations 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
green, cyprus green 
Class
Monoclinic 
Hardness
Collection
Bill Wilson Collection

Villiaumite

with Aegerine & Sodalite - #BW57386
Locality
Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada 
Formula
NaF 
Availability
Sold
Size
5 x 3.5 x 2.5 cm - Miniature 

Tabular red crystals of Villiaumite to 9mm in Sodalite matrix with Aegerine.


Villiaumite

Formula
NaF 
Crystal System
Isometric 
Crystal Habit
Massive - Granular, Granular 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
colorless, dark red, orange brown, pink 
Streak
pinkish white 
Class
Isometric - Hexoctahedral 
Fracture
Brittle 
Hardness
2.5 
Collection
Bill Wilson Collection

Wadeite

with Eudialyte - #BW57378
Locality
Kirovskii mine, Kukisvumchorr Mt., Khibiny Massif, Kola Peninsula, Russia 
Formula
K2ZrSi3O9 
Availability
Available
Price
$45.00
Size
4 x 2.5 x 2.5 cm - Miniature 

The Wadeite form a light lilac colored halo around the red Eudialyte.


Wadeite

Formula
K2ZrSi3O9 
Crystal System
Hexagonal 
Crystal Habit
Prismatic, Hexagonal 
Cleavage
None, None, None 
Luster
Adamantine 
Color
colorless, violet, light lilac, pink 
Streak
white 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
5.5-6 
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Wroewolfeite

#BW57383
Locality
Manhan mines, Easthampton, Hampshire Co., Massachusetts, United States 
Formula
Cu4SO4(OH)6·2H2
Availability
Sold
Size
4.5 x 1.5 x 2 cm - Miniature 
Tagged
copper  

Almost a cobalt blue crystalline areas occupying an area roughly 6x8mm plus a few smaller area. 


Wroewolfeite

Formula
Cu4SO4(OH)6·2H2
Crystal System
Monoclinic 
Crystal Habit
Encrustations 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
greenish blue, dark greenish blue 
Streak
light blue 
Class
Monoclinic - Domatic 
Hardness
2.5 
Collection
Bill Wilson Collection

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