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Mixed Minerals

Friday, 03 May 2019 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including malachite, millerite, pabstite, pyrrhotite, stolzite, and villiaumite and more from places like Cannington, Sedgemoor, Somerset, England, Coed-Ely Colliery, Coed Ely, Rhondda-Cynon-Taff, Wales, Kalkar quarry, Santa Cruz Co., California, United States, 2nd Sovetskii mine, Dal'negorsk, Primorskiy Kray, Russia, Silver Coin mine, Humboldt Co., Nevada, United States, and Mt. Karnasurt, Lovozero Massif, Kola Peninsula, Russia.

Malachite

with Azurite - #50401
Locality
Cannington, Sedgemoor, Somerset, England 
Formula
Cu2CO3(OH)2 
Availability
Available
Price
$85.00
Size
8.5 x 6.5 x 4.5 cm - Sm Cabinet 
Tagged
carbonate , copper  

Fascinating "curly" Malachite in vugs with Azurite. The longest Malachite thread is over 1.5cm.


Malachite

Formula
Cu2CO3(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Botryoidal, Stalactitic, Massive - Fibrous 
Cleavage
Perfect, Fair, None 
Luster
Vitreous - Silky 
Color
green, dark green, blackish green 
Streak
light green 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
3.5-4 
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Millerite

#50400
Locality
Coed-Ely Colliery, Coed Ely, Rhondda-Cynon-Taff, Wales 
Formula
NiS 
Availability
Available
Price
$125.00
Size
11.5 x 6 x 7 cm - Cabinet 
Tagged
sulfide , nickel  

Quite possibly this spray has been altered to Honessite. The spray is 1cm.


Millerite

Formula
NiS 
Crystal System
Trigonal 
Crystal Habit
Acicular, Massive 
Cleavage
Perfect, Perfect, None 
Luster
Metallic 
Color
bronze, greenish gray, gray, brass yellow 
Streak
greenish black 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Uneven 
Hardness
3-3.5 
Mineralpedia
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SOLD
Pabstite - 48376
Pabstite - 48376

Pabstite

#48376
Locality
Kalkar quarry, Santa Cruz Co., California, United States 
Formula
BaSnSi3O9 
Availability
Sold
Size
2 x 2 x 2 cm - Thumbnail 
Tagged
tin  
Special Info
Fluorescent 
Special Info
Type Locality 

Pabstite can be observed under UV lighting, otherwise nearly impossible to see. This specimen is very, very rich.


Pabstite

Formula
BaSnSi3O9 
Crystal System
Hexagonal 
Crystal Habit
Anhedral Grains 
Luster
Vitreous (Glassy) 
Color
colorless, white 
Streak
white 
Class
Hexagonal - Ditrigonal Dipyramidal 
Hardness
Special Info
Fluorescent
Special Info
Type Locality
Mineralpedia
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Pyrrhotite

with Sphalerite - #50678
Locality
2nd Sovetskii mine, Dal'negorsk, Primorskiy Kray, Russia 
Formula
Fe7S8 
Availability
Sold
Size
8 x 7.5 x 4.5 cm - Sm Cabinet 
Tagged
sulfide  

A large 3.5cm brassy Pyrrhotite crystal, along with others associated with black, iridescent Sphalerite tetrahedrons.


Pyrrhotite

Formula
Fe7S8 
Crystal System
Monoclinic 
Crystal Habit
Tabular, Platy, Massive - Granular 
Cleavage
Imperfect, Imperfect, None 
Luster
Metallic 
Color
bronze, bronze red, dark brown 
Streak
gray black 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
3.5-4 
Collection
Robert J. Waidler Collection

Stolzite

with Chlorargyrite & Mimetite - #22152
Locality
Silver Coin mine, Humboldt Co., Nevada, United States 
Formula
PbWO4 
Availability
Sold
Size
6.5 x 3 x 2.5 cm - Sm Cabinet 

This is a very good or even exceptional specimen of Stolzite crystals. There are four good thin, tabular crystals. The largest is 1.5mm. Associated with the Stolzite are acicular white sprays of Mimetite and waxy grey blebs of Chlorargyrite.


Stolzite

Formula
PbWO4 
Crystal System
Tetragonal 
Crystal Habit
Crystalline - Coarse, Granular, Tabular 
Cleavage
Indistinct, Imperfect, None 
Luster
Adamantine - Resinous 
Color
reddish brown, yellowish brown, brown, greenish brown, gray 
Streak
white 
Class
Tetragonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
2.5-3 
Mineralpedia
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Villiaumite

(graphic intergrowths) in Microcline - #41234
Locality
Mt. Karnasurt, Lovozero Massif, Kola Peninsula, Russia 
Formula
NaF 
Availability
Available
Price
$125.00
Size
8 x 4 x 2 cm - Sm Cabinet 

Villiaumite (red) forms graphic intergrowths showing skeletal and arborescent growth habits in green Microcline. This type of intergrowth has also been termed "elatolith". 


Villiaumite

Formula
NaF 
Crystal System
Isometric 
Crystal Habit
Massive - Granular, Granular 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
colorless, dark red, orange brown, pink 
Streak
pinkish white 
Class
Isometric - Hexoctahedral 
Fracture
Brittle 
Hardness
2.5 

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