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Mixed Minerals

Sunday, 24 July 2022 07:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including diopside, dioptase, dussertite, ferrimolybdite, fluorite, and fluorluanshiweiite and more from places like Prabornaz mine, Saint-Marcel, Aosta Valley, Italy, Tsumeb mine, Tsumeb, Namibia, Djebel Debar, Constantine, Algeria, Little Cottonwood Canyon, Wasatch Mts, Salt Lake Co., Utah, United States, Melchor Múzquiz, Coahuila, Mexico, and Shuk-Byul' peg., Sol'bel'der peg. field, Sangilen Uppland, Tuva, Siberia, Russia.

Diopside

var. violane - #BW58851
Locality
Prabornaz mine, Saint-Marcel, Aosta Valley, Italy 
Formula
CaMgSi2O6 
Availability
Sold
Size
8 x 4.5 x 4.5 cm - Sm Cabinet 

This is a rare color variety of Diopside called "violane". Apparently the color is due to a little manganese in the structure. 


Diopside

Formula
CaMgSi2O6 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Blocky, Granular 
Cleavage
Good, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
blue, brown, colorless, green, gray 
Streak
white green 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Bill Wilson Collection
Mineralpedia
View Diopside
On Dakota Matrix
Previously Sold Diopside
On Dakota Matrix
Other Available Diopside
WebMineral
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Mindat
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Dioptase

#WR58870
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
CuSiO3·H2
Availability
Available
Price
$45.00
Size
3 x 2.5 x 2 cm - Thumbnail 
Tagged
copper  

Nice coverage of sparkly green Dioptase crystals to 2m.


Dioptase

Formula
CuSiO3·H2
Crystal System
Trigonal 
Crystal Habit
Massive, Cryptocrystalline, Crystalline - Coarse 
Cleavage
Good, None, None 
Luster
Vitreous (Glassy) 
Color
dark blue green, emerald green, turquoise 
Streak
green 
Class
Trigonal - Rhombohedral 
Fracture
Conchoidal 
Hardness
Collection
Willard L. Roberts Collection
Mineralpedia
View Dioptase
On Dakota Matrix
Previously Sold Dioptase
On Dakota Matrix
Other Available Dioptase
WebMineral
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Mindat
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Dussertite

#BW58856
Locality
Djebel Debar, Constantine, Algeria 
Formula
BaFe3+3(AsO4)(AsO3OH)(OH)6 
Availability
Sold
Size
7 x 5.5 x 5.5 cm - Sm Cabinet 
Tagged
arsenate  
Special Info
Type Locality 

This specimen is just loaded with micro sugary Dussertite. It's a good specimen from this locality (the type locality) and is a rather uncommon barium arsenate.


Dussertite

Formula
BaFe3+3(AsO4)(AsO3OH)(OH)6 
Crystal System
Trigonal 
Luster
Vitreous - Resinous 
Color
green, yellow green 
Class
Trigonal - Ditrigonal Pyramidal 
Hardness
3.5 
Collection
Bill Wilson Collection
Special Info
Type Locality

Ferrimolybdite

with Molybdenite - #BW58859
Locality
Little Cottonwood Canyon, Wasatch Mts, Salt Lake Co., Utah, United States 
Formula
Fe3+2(Mo6+O4)3·7H2
Availability
Sold
Size
6.5 x 5 x 5.5 cm - Sm Cabinet 

Straw yellow matted and fibrous Ferrimolybdite with good rich coverage in many vugs with plates of Molybdenite to 2mm, Quartz and a weird 2mm cavernous Pyrite.


Ferrimolybdite

Formula
Fe3+2(Mo6+O4)3·7H2
Crystal System
Orthorhombic 
Crystal Habit
Earthy, Scaly, Fibrous 
Cleavage
Distinct, None, None 
Luster
Silky 
Color
yellow, canary yellow, sulfur yellow 
Streak
light yellow 
Class
Orthorhombic 
Fracture
Uneven 
Hardness
2.5-3 
Collection
Bill Wilson Collection

Fluorite

#58868
Locality
Melchor Múzquiz, Coahuila, Mexico 
Formula
CaF2 
Availability
Available
Price
$40.00
Size
4.5 x 4 x 4 cm - Miniature 

Light purple Flourite crystals.


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
Willard L. Roberts Collection
Mineralpedia
View Fluorite
On Dakota Matrix
Previously Sold Fluorite
On Dakota Matrix
Other Available Fluorite
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Mindat
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Fluorluanshiweiite

with Spodumene - #57768
Locality
Shuk-Byul' peg., Sol'bel'der peg. field, Sangilen Uppland, Tuva, Siberia, Russia 
Formula
KLiAl1.5(Si3.5Al0.5)O10F2 
Availability
Sold
Size
3.5 x 2 x 3 cm - Miniature 
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 

Rich groups of lilac lamellae to 7mm. It is micaceous and in fact is a lithium Mica. This is the second worldwide locality, which is apparently not yet published. It is associated with Spodumene, a lithium silicate. Verified by Dr. Igor Pekov.


Special Info
XRD Confirmed
Special Info
EDS Confirmed

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