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Mixed Minerals

Friday, 09 October 2020 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including andorite, arsenic, belyankinite, chrysocolla, horvathite-(y), and parnauite and more from places like Itos mine, near Oruro City, Oruro Dept., Bolivia, Port Alberni, Vancouver Island, British Columbia, Canada, Kedykverpakhk Mt., Lovozero Massif, Kola Peninsula, Russia, Inspiration mine, Globe-Miami dist., Gila Co., Arizona, United States, Mont Saint-Hilaire, Rouville Co., Quebec, Canada, and Cap Garonne mine, Le Pradet, Var, France.

Andorite

with Pyrite - #BC52637
Locality
Itos mine, near Oruro City, Oruro Dept., Bolivia 
Formula
Ag15Pb18Sb47S96 
Availability
Available
Price
$195.00
Size
7 x 7 x 2.5 cm - Sm Cabinet 

Several groups of tabular and striated rare Andorite crystals. Individual crystals maesure up to 6mm. 


Andorite

Formula
PbAgSb3S6 
Crystal System
Orthorhombic 
Crystal Habit
Striated, Tabular 
Cleavage
None, None, None 
Luster
Metallic 
Color
grayish yellow, dark gray, steel gray 
Streak
black 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3-3.5 
Collection
Barbara Cureton Collection
Mineralpedia
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Previously Sold Andorite
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Other Available Andorite
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Arsenic

#WR54235
Locality
Port Alberni, Vancouver Island, British Columbia, Canada 
Formula
As 
Availability
Available
Price
$375.00
Size
9 x 6 x 3 cm - Sm Cabinet 
Tagged
native element  

I don't know if the specimen is waterworn, and I can't explain the natural smooth surface. But is an unusual specimen, heavy and rare. It is one of the largest arsenic specimens I have seen come across my desk. Quite unique! There is a note on one of the older labels stating "extra good specimen, from my own collection". I assume the recipient was Bill Roberts, but I am not sure who made that statement, but I am sure is is true, even today.


Arsenic

Formula
As 
Crystal System
Trigonal 
Crystal Habit
Nodular, Reniform, Lamellar 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
lead gray, gray, white 
Streak
black 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Uneven 
Hardness
3.5 
Collection
Willard L. Roberts Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Arsenic
On Dakota Matrix
Other Available Arsenic
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Mindat
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Belyankinite

#PD54037
Locality
Kedykverpakhk Mt., Lovozero Massif, Kola Peninsula, Russia 
Formula
Ca1-2(Ti,Nb)5O12 · 9H2O (?) 
Availability
Available
Price
$35.00
Size
3 x 1.5 x 1.5 cm - Thumbnail 
Tagged
pegmatite mineral  

The Belyankinite is the cream colored plate, a two-locality titanium-niobium mineral found at two localities worldwide.


Belyankinite

Formula
Ca1-2(Ti,Zr,Nb5O12*9(H2O) (?) 
Crystal System
No Crystals 
Crystal Habit
Platy, Aggregates 
Cleavage
Perfect 
Luster
Vitreous - Greasy 
Color
yellow, brownish yellow 
Class
Amorphous - No Crystals 
Fracture
Brittle - Uneven 
Hardness
2-3 

Chrysocolla

#BC52650
Locality
Inspiration mine, Globe-Miami dist., Gila Co., Arizona, United States 
Formula
(Cu,Al)2H2Si2O5(OH)4·nH2
Availability
Available
Price
$250.00
Size
15 x 11 x 6 cm - Cabinet 
Tagged
copper  

This is a large cabinet specimen of solid light to deep blue Chrysocolla. It is a stunning in-person and is translucent in places with a waxy to vitreous luster. It is a must have for anyone who wishes to obtain a large eye-catching centerpiece for the display case.


Chrysocolla

Formula
(Cu,Al)2H2Si2O5(OH)4·nH2
Crystal System
Orthorhombic 
Crystal Habit
Botryoidal, Earthy, Stalactitic 
Cleavage
None, None, None 
Luster
Vitreous - Dull 
Color
green, bluish green, blue, blackish blue, brown 
Streak
light green 
Class
Orthorhombic 
Fracture
Brittle - Sectile 
Hardness
2.5-3.5 
Collection
Barbara Cureton Collection

Horvathite-(Y)

#40979
Locality
Mont Saint-Hilaire, Rouville Co., Quebec, Canada 
Formula
NaY(CO3)F2 
Availability
Available
Price
$125.00
Size
5 x 2.5 x 2 cm - Miniature 
Tagged
carbonate , REE mineral  
Special Info
Type Locality 

It was hard to capture all the crystals of Horvathite in this specimen. But they are honey colored, tabular and peculiar looking to 2mm. In association are light pink Rhodochrosite crystals. Horvathite-(Y) is not only a REE mineral but it is only found at MSH and the Saint-Amable sill in Quebec.


Horvathite-(Y)

Formula
NaY(CO3)F2 
Crystal System
Orthorhombic 
Crystal Habit
Tabular 
Cleavage
Very Good, Good, None 
Luster
Vitreous (Glassy) 
Color
colorless, pale yellow, pale beige 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness
Special Info
Type Locality

Parnauite

with Cornwallite - #AH53570
Locality
Cap Garonne mine, Le Pradet, Var, France 
Formula
Cu9(AsO4)2(SO4)(OH)10·7H2
Availability
Available
Price
$35.00
Size
2 x 2.1 x 1.8 cm - Thumbnail 
Tagged
arsenate , copper  

Micro, thin, plates of Parnauite in rosette-like groups.


Parnauite

Formula
Cu9(AsO4)2(SO4)(OH)10·7H2
Crystal System
Orthorhombic 
Crystal Habit
Rosette, Scaly, Encrustations 
Cleavage
Good, None, None 
Color
blue green, green, light blue 
Streak
greenish white 
Class
Orthorhombic - Disphenoidal 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
View Parnauite
On Dakota Matrix
Previously Sold Parnauite
On Dakota Matrix
Other Available Parnauite
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Mindat
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