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0 item @ $0.00  

Mixed Minerals

Friday, 10 March 2017 08:00 AM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including azurite, calcite, cassiterite, copper, enargite, and eudialyte and more from places like Guangnan Co., Wenshan, Yunnan, China, Adventure mine, Ontonagon Co., Michigan, United States, Huanuni mine, Dalance Prov., Oruro dept., Bolivia, Central Mine, Central, Keweenaw Co., Michigan, United States, Butte dist., Silver Bow Co., Montana, United States, and Kipawa alkaline complex, Quebec, Canada.

SOLD
Azurite - BN46551
Azurite - BN46551

Azurite

#BN46551
Locality
Guangnan Co., Wenshan, Yunnan, China 
Formula
Cu3(CO3)2(OH)2 
Availability
Sold
Size
4.5 x 4 x 3.5 cm - Miniature 
Tagged
carbonate , copper  

A "starburst" crystal group of tabular Azurite crystals to 1cm with pointed terminations. Darker blue than the photos show.


Azurite

Formula
Cu3(CO3)2(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Tabular, Prismatic, Stalactitic 
Cleavage
Perfect, Fair, None 
Luster
Vitreous (Glassy) 
Color
azure blue, blue, light blue, dark blue 
Streak
light blue 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
Collection
Dr. Buford L. Nichols Collection
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Previously Sold Azurite
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Calcite

#PD46568
Locality
Adventure mine, Ontonagon Co., Michigan, United States 
Formula
CaCO3 
Availability
Sold
Size
7 x 4 x 3.5 cm - Sm Cabinet 
Tagged
carbonate  

Two generations of Calcite with scalenohedral (1cm) crystals topped with a short prismatic nail-head (3mmx6mm) Calcite crystal. 


Calcite

Formula
CaCO3 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Stalactitic, Massive 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
colorless, white, pink, yellow, brown 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Phillips Collection
Mineralpedia
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Mindat
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Cassiterite

#BN46561
Locality
Huanuni mine, Dalance Prov., Oruro dept., Bolivia 
Formula
SnO2 
Availability
Sold
Size
4.5 x 2.5 x 2 cm - Miniature 

Lustrous prismatic crystals with pyramidal terminations. The crystals are about 6mm and show a yellow color when backlit.


Cassiterite

Formula
SnO2 
Crystal System
Tetragonal 
Crystal Habit
Prismatic, Massive, Botryoidal 
Cleavage
Perfect, Indistinct, None 
Luster
Adamantine 
Color
brown, brownish black, colorless, green, gray 
Streak
brownish white 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Irregular 
Hardness
6-7 
Collection
Dr. Buford L. Nichols Collection

Copper

#PD46566
Locality
Central Mine, Central, Keweenaw Co., Michigan, United States 
Formula
Cu 
Availability
Sold
Size
10 x 9 x 3 cm - Cabinet 
Tagged
native element  

This does not look like much of a specimen unitil you observe it closely and see loads of well-formed crystals from 3-8mm. It is Ex-Paul Moore and is number specimen which matches the label.


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
Phillips Collection
Mineralpedia
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Enargite

with Pyrite - #46525
Locality
Butte dist., Silver Bow Co., Montana, United States 
Formula
Cu3AsS4 
Availability
Sold
Size
6.5 x 4 x 2 cm - Sm Cabinet 
Tagged
sulfide , copper  

Black, very lustrous, prismatic crystals of Enargite to 6mm amongst excellent Pyrite crystals and Quartz. This is a very clean and attractive specimen.


Enargite

Formula
Cu3AsS4 
Crystal System
Orthorhombic 
Crystal Habit
Euhedral Crystals, Massive - Granular, Prismatic 
Cleavage
Perfect, Distinct, Distinct 
Luster
Metallic 
Color
steel gray, blackish gray, violet black 
Streak
black 
Class
Orthorhombic - Pyramidal 
Fracture
Uneven 
Hardness
Mineralpedia
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Eudialyte

with Magnesio-arfvedsonite & Albite - #PD45372
Locality
Kipawa alkaline complex, Quebec, Canada 
Formula
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 
Availability
Sold
Size
10 x 9 x 9 cm - Cabinet 
Tagged
pegmatite mineral  

Red Eudialyte as large tabular crystals to 2cm with coarse Magnesio-arfvedsonite & Albite. 


Eudialyte

Formula
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 
Crystal System
Trigonal 
Crystal Habit
Massive - Granular, Tabular 
Cleavage
Imperfect, None, None 
Luster
Vitreous (Glassy) 
Color
pinkish red, red, yellow, yellowish brown, violet 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Uneven 
Hardness
5-5.5 
Collection
Phillips Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Eudialyte
On Dakota Matrix
Other Available Eudialyte
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Mindat
View Eudialyte

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