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Mixed Minerals

Sunday, 20 November 2022 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including parnauite, penroseite, phurcalite, richelsdorfite, scolecite, and smithsonite and more from places like Majuba Hill mine, Pershing Co., Nevada, United States, Pacajake, Colquechaca, Potosi dept., Bolivia, Posey mine, San Juan Co., Utah, United States, Richelsdorf, Hesse, Germany, Jalgaon dist., Maharashtra, India, and Kelly mine, Socorro Co., New Mexico, United States.

Parnauite

#59705
Locality
Majuba Hill mine, Pershing Co., Nevada, United States 
Formula
Cu9(AsO4)2(SO4)(OH)10·7H2
Availability
Sold
Size
3 x 2.5 x 2 cm - Thumbnail 
Tagged
arsenate , copper  
Special Info
Type Locality 

It's hard to find good Parnauite on the market now-a-days and Majuba is under private claim. These crystals are terrific with nice green velvety luster in well-formed groups. Specifically, this specimen was found in the Copper Stope.


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
Special Info
Type Locality
Mineralpedia
View Parnauite
On Dakota Matrix
Previously Sold Parnauite
On Dakota Matrix
Other Available Parnauite
WebMineral
View Parnauite
Mindat
View Parnauite

Penroseite

#59700
Locality
Pacajake, Colquechaca, Potosi dept., Bolivia 
Formula
NiSe2 
Availability
Sold
Size
2.2 x 1.5 x 0.8 cm - Thumbnail 
Tagged
sulfide  
Special Info
Type Locality 

Black massive rich piece. I have never seen crystals of Penroseite. Has anybody?


Penroseite

Formula
NiSe2 
Crystal System
Isometric 
Crystal Habit
Reniform, Radial, Columnar 
Cleavage
Perfect, Distinct, None 
Luster
Metallic 
Color
lead gray, steel gray 
Streak
black 
Class
Isometric - Diploidal 
Fracture
Brittle 
Hardness
2.5-3 
Special Info
Type Locality

Phurcalite

#59727
Locality
Posey mine, San Juan Co., Utah, United States 
Formula
Ca2(UO2)3O2(PO4)2·7H2
Availability
Available
Price
$35.00
Size
2.5 x 2 x 1.5 cm - Thumbnail 
Tagged
phosphate  

Yellow acicular crystal sprays.


Phurcalite

Formula
Ca2(UO2)3O2(PO4)2·7H2
Crystal System
Orthorhombic 
Cleavage
Perfect, Perfect, Good 
Luster
Vitreous - Adamantine 
Color
yellow 
Streak
yellow white 
Class
Orthorhombic - Dipyramidal 
Hardness

Richelsdorfite

#59723
Locality
Richelsdorf, Hesse, Germany 
Formula
Ca2Cu5Sb5+(AsO4)4(OH)6Cl·6H2
Availability
Sold
Size
2.5 x 1.5 x 1 cm - Thumbnail 
Tagged
copper  
Special Info
Type Locality 

Bluish or aqua blue spherulitic crystal groups less than 0.2mm with good rich coverage from the type locality.


Richelsdorfite

Formula
Ca2Cu5Sb5+(AsO4)4(OH)6Cl·6H2
Crystal System
Monoclinic 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
sky blue, turquoise 
Streak
greenish blue 
Class
Monoclinic - Prismatic 
Hardness
Special Info
Type Locality

Scolecite

#59646
Locality
Jalgaon dist., Maharashtra, India 
Formula
Ca(Si3Al2)O10·3H2
Availability
Sold
Size
7 x 5 x 33 cm - Cabinet 

White, sharply pointed, needle-like crystals of Scolecite to 3mm in a Quartz vug.


Scolecite

Formula
Ca(Si3Al2)O10·3H2
Crystal System
Monoclinic 
Crystal Habit
Massive - Fibrous, Radial 
Cleavage
Perfect, None, None 
Luster
Vitreous - Silky 
Color
brownish, colorless, white 
Streak
white 
Class
Monoclinic - Domatic 
Fracture
Brittle - Uneven 
Hardness
5-5.5 
Mineralpedia
View Scolecite
On Dakota Matrix
Previously Sold Scolecite
On Dakota Matrix
Other Available Scolecite
WebMineral
View Scolecite
Mindat
View Scolecite

Smithsonite

#59538
Locality
Kelly mine, Socorro Co., New Mexico, United States 
Formula
ZnCO3 
Availability
Available
Price
$75.00
Size
4.5 x 3.5 x 3 cm - Miniature 
Tagged
carbonate  

Light blue shimering Smithsonite. Excellent miniature from this hard-to-obtain lcoality.


Smithsonite

Formula
ZnCO3 
Crystal System
Trigonal 
Crystal Habit
Botryoidal, Reniform, Earthy 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
grayish white, dark gray, green, blue, yellow 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle 
Hardness
4.5 

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