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Mixed Minerals

Thursday, 07 February 2019 08:00 AM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including astrophyllite, chalcanthite, datolite, and novacekite and more from places like Khibiny Massif, Kola Peninsula, Russia, Majuba Hill mine, Pershing Co., Nevada, United States, Freiberg dist., Erzgebirge, Saxony, Germany, and Animas mine, Francisco Portillo, Santa Eulalia dist., Chihuahua, Mexico.

Astrophyllite

#DP50212
Locality
Khibiny Massif, Kola Peninsula, Russia 
Formula
K2NaFe2+7Ti2(Si4O12)2O2(OH)4
Availability
Available
Price
$50.00
Size
6 x 3.5 x 3 cm - Sm Cabinet 

Coppery red long bladed crystals to over 1cm in syenite matrix.


Astrophyllite

Formula
K2NaFe2+7Ti2(Si4O12)2O2(OH)4
Crystal System
Triclinic 
Crystal Habit
Bladed, Stellate, Crystalline - Fine 
Cleavage
Perfect, None, None 
Luster
Adamantine - Pearly 
Color
brown, brownish red, bronze yellow, gold yellow 
Streak
yellowish brown 
Class
Triclinic - Pedial 
Fracture
Brittle 
Hardness
3-3.5 
Collection
Don Phillips Collection

Chalcanthite

#50153
Locality
Majuba Hill mine, Pershing Co., Nevada, United States 
Formula
CuSO4·5H2
Availability
Available
Price
$40.00
Size
7 x 5 x 4 cm - Sm Cabinet 
Tagged
copper  

Rich, deep blue Chalcanthite "veins" to 1cm.


Chalcanthite

Formula
CuSO4·5H2
Crystal System
Triclinic 
Crystal Habit
Encrustations, Stalactitic, Reniform 
Cleavage
Imperfect, Indistinct, Indistinct 
Luster
Vitreous (Glassy) 
Color
green, green blue, light blue, dark blue 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Conchoidal 
Hardness
2.5 

Datolite

with Calcite - #50182
Locality
Freiberg dist., Erzgebirge, Saxony, Germany 
Formula
CaBSiO4(OH) 
Availability
Available
Price
$95.00
Size
7 x 5 x 2 cm - Sm Cabinet 

Colorless to yellow crystals of Datolite (?) to 1.2cm with discoidal Calcite.


Datolite

Formula
CaBSiO4(OH) 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Granular, Porcelainous 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
brown, colorless, yellow, white, light green 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
5.5 
Collection
Don Phillips Collection
Mineralpedia
View Datolite
On Dakota Matrix
Previously Sold Datolite
On Dakota Matrix
Other Available Datolite
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Mindat
View Datolite

Novacekite

with Aragonite - #50206
Locality
Animas mine, Francisco Portillo, Santa Eulalia dist., Chihuahua, Mexico 
Formula
Mg(UO2)2(AsO4)2·12H2
Availability
Available
Price
$95.00
Size
5 x 4.5 x 3.5 cm - Miniature 

Rich specimen with canary yellow tabular crystals of Novacekite to 2mm and sharp, colorless Aragonite.


Novacekite

Formula
Mg(UO2)2(AsO4)2*12(H2O) 
Crystal System
Tetragonal 
Cleavage
Perfect, Indistinct, Indistinct 
Luster
Vitreous (Glassy) 
Color
light yellow, straw yellow 
Streak
yellow white 
Class
Tetragonal - Dipyramidal 
Hardness
2.5 

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