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0 item @ $0.00  

Mixed Minerals

Friday, 10 September 2021 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including topaz, and vivianite and more from places like Tin mine, Altenberg, Erzgebirge, Saxony, Germany, and Big Fish River, Dawson dist., Yukon Territory, Canada.

Topaz

var. pyknite with Zinnwaldite - #AH52527
Locality
Tin mine, Altenberg, Erzgebirge, Saxony, Germany 
Formula
Al2SiO4F2 
Availability
Sold
Size
6.5 x 5 x 2.5 cm - Sm Cabinet 

This is a real cool specimen of Topaz, variety pyknite, which is a dense aggregate if prismatic crystals. The color is a lemon yellow and carries a good luster.


Topaz

Formula
Al2SiO4F2 
Crystal System
Orthorhombic 
Crystal Habit
Crystalline - Coarse, Prismatic, Massive - Granular 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, pale blue, yellow, yellowish brown, red 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Topaz
On Dakota Matrix
Other Available Topaz
WebMineral
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Mindat
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Vivianite

#56453
Locality
Big Fish River, Dawson dist., Yukon Territory, Canada 
Formula
Fe2+3(PO4)2·8H2
Availability
Sold
Size
6 x 3.5 x 4 cm - Sm Cabinet 
Tagged
phosphate  

Dark blue long plates of Vivianite with pointed terminations to almost 2.5cm. The Vivianite is well-protected in a large cavity. 


Vivianite

Formula
Fe2+3(PO4)2·8H2
Crystal System
Monoclinic 
Crystal Habit
Divergent, Concretionary, Earthy 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
colorless, green, blue, dark green, dark bluish green 
Streak
bluish white 
Class
Monoclinic - Prismatic 
Fracture
Sectile 
Hardness
1.5-2 
Collection
Don Phillips Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Vivianite
On Dakota Matrix
Other Available Vivianite
WebMineral
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Mindat
View Vivianite

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