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Mixed Minerals

Sunday, 12 December 2021 04:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including azurite, dravite, fluorite, thomsonite-ca, and zircon and more from places like Big Indian Copper mine, San Juan Co., Utah, United States, Yinnietharra Station, Pilbara, Western Australia, Australia, Upper Cramer Lake, Custer Co., Idaho, United States, Goble, Columbia Co., Oregon, United States, and Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada.

Azurite

#AH57200
Locality
Big Indian Copper mine, San Juan Co., Utah, United States 
Formula
Cu3(CO3)2(OH)2 
Availability
Available
Price
$35.00
Size
4.5 x 4 x 2 cm - Miniature 
Tagged
carbonate , copper  

Deep blue Azurite filling voids in sandstone matrix.


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
Arnold G Hampson Collection
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Previously Sold Azurite
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Dravite

#57101
Locality
Yinnietharra Station, Pilbara, Western Australia, Australia 
Formula
NaMg3Al6(BO3)3Si6O18(OH)4 
Availability
Sold
Size
3.6 x 2.6 x 2.7 cm - Miniature 

A complete, doubly terminated, dark brown and lustrous Dravite crystal.


Dravite

Formula
NaMg3Al6(BO3)3Si6O18(OH)4 
Crystal System
Trigonal 
Crystal Habit
Massive, Columnar, Divergent 
Cleavage
Indistinct, None, None 
Luster
Vitreous - Resinous 
Color
black, green, red, blue, white 
Streak
colorless 
Class
Trigonal - Ditrigonal Pyramidal 
Fracture
Sub Conchoidal 
Hardness
7-7.5 
On Dakota Matrix
Previously Sold Dravite
On Dakota Matrix
Other Available Dravite
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Fluorite

on Albite - #57183
Locality
Upper Cramer Lake, Custer Co., Idaho, United States 
Formula
CaF2 
Availability
Available
Price
$45.00
Size
3.5 x 4 x 2.5 cm - Miniature 

Light green mal-formed octahedral crystals of Fluorite to 2mm on Albite with Quartz. This is a good locality specimen with Fluorite being very rare.


Fluorite

Formula
CaF2 
Crystal System
Isometric 
Crystal Habit
Crystalline - Coarse, Massive - Granular, Disseminated 
Cleavage
Three perfect, octahedral cleavages. 
Luster
Vitreous (Glassy) 
Color
purple, clear, yellow, green, red, blue 
Streak
white 
Geological Setting
Occurs in a wide range of geologic environments including low temperature Missississippi Valley lead-zinc deposits, hydrothermal gold deposits, Alpine cleft metamorphic environments  
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness
Collection
Chris van Laer Collection
Mineralpedia
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Previously Sold Fluorite
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Thomsonite-Ca

with Chabazite - #AH56976
Locality
Goble, Columbia Co., Oregon, United States 
Formula
NaCa2(Al5Si5)O20·6H2
Availability
Available
Price
$45.00
Size
4 x 2.5 x 1.5 cm - Miniature 
Tagged
zeolite  

Several snow white clusters of fibrous Thomsonite with tiny, waterclear Chabazite crystals covering much of the Thomsonite.


Thomsonite-Ca

Formula
NaCa2(Al5Si5)O20·6H2
Crystal System
Orthorhombic 
Crystal Habit
Radial, Fibrous, Spherical 
Cleavage
Perfect, Good, None 
Luster
Vitreous (Glassy) 
Color
colorless, greenish, yellow, white, pink 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
5-5.5 
Collection
Arnold G Hampson Collection

Zircon

#57180
Locality
Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada 
Formula
ZrSiO4 
Availability
Available
Price
$40.00
Size
4 x 3.5 x 2.5 cm - Miniature 

Creamy beige 4mm crystals of Zircon with stout, large, very nice Natrolite.


Zircon

Formula
ZrSiO4 
Crystal System
Tetragonal 
Crystal Habit
Prismatic, Tabular, Crystalline - Fine 
Cleavage
Indistinct, None, None 
Luster
Adamantine 
Color
brown, reddish brown, colorless, gray, green 
Streak
white 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Uneven 
Hardness
7.5 
Collection
Chris van Laer Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Zircon
On Dakota Matrix
Other Available Zircon
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Mindat
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