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Mixed Minerals

Sunday, 21 February 2021 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including mimetite, natrolite, pectolite, pellyite, phurcalite, and polybasite and more from places like Mina Ojuela, Mapimi, Durango, Mexico, 3M quarry, Little Rock, Pulaski Co., Arkansas, United States, Jeffrey mine, Asbestos, Quebec, Canada, Esquire #8 claim, Big Creek, Fresno Co., California, United States, Merrivale quarry, Dartmoor, Devon, England, and Guanajuato, Guanajuato, Mexico.

Mimetite

with Wulfenite - #AH52016
Locality
Mina Ojuela, Mapimi, Durango, Mexico 
Formula
Pb5(AsO4)3Cl 
Availability
Sold
Size
10 x 7 x 6 cm - Cabinet 
Tagged
arsenate  

Greenish yellow sprays of Mimetite with sparse 1mm Wulfenite crystals.


Mimetite

Formula
Pb5(AsO4)3Cl 
Crystal System
Hexagonal 
Crystal Habit
Reniform, Globular, Prismatic 
Cleavage
Imperfect, None, None 
Luster
Adamantine - Resinous 
Color
white, yellow, orange, brown, red 
Streak
white 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
Collection
Arnold G Hampson Collection
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Natrolite

with Aegerine - #55149
Locality
3M quarry, Little Rock, Pulaski Co., Arkansas, United States 
Formula
Na2(Si3Al2)O10·2H2
Availability
Sold
Size
18 x 8 x 8 cm - Cabinet 

Excellent and colorless crystals of Natrolite crystals to to 8mm with scattered Aegerine needles to 7mm. Very cool specimen.


Natrolite

Formula
Na2(Si3Al2)O10·2H2
Crystal System
Orthorhombic 
Crystal Habit
Acicular, Prismatic, Nodular 
Cleavage
Perfect, Imperfect, None 
Luster
Vitreous - Silky 
Color
white, colorless, red, yellowish white, reddish white 
Streak
white 
Class
Orthorhombic - Pyramidal 
Fracture
Brittle 
Hardness
5.5-6 
Collection
Don Owens Collection
Mineralpedia
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Previously Sold Natrolite
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Mindat
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Pectolite

#55150
Locality
Jeffrey mine, Asbestos, Quebec, Canada 
Formula
NaCa2Si3O8(OH) 
Availability
Sold
Size
19 x 9 x 6 cm - Cabinet 

Sharp fibrous Pectolite in random and radial groups to 2cm. If you buy, please handle carefully as the crystals will easily penetrate your skin.


Pectolite

Formula
NaCa2Si3O8(OH) 
Crystal System
Triclinic 
Crystal Habit
Acicular, Globular, Radial 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous - Silky 
Color
white, gray, light pink, light green 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Splintery 
Hardness
Mineralpedia
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Pellyite

with Gillespite - #42235
Locality
Esquire #8 claim, Big Creek, Fresno Co., California, United States 
Formula
Ba2CaFe2+2Si6O17 
Availability
Sold
Size
5.5 x 1 x 2.5 cm - Sm Cabinet 

Pellyite is one of the rarest minerals at Big Creek. It can be seen in the photos as glassy brown crystalline masses in a 3-6mm vein with Sanbornite and Quartz and minor grains of Gillespite.


Pellyite

Formula
Ba2CaFe2+2Si6O17 
Crystal System
Orthorhombic 
Crystal Habit
Massive 
Cleavage
Indistinct, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
colorless, light yellow 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
Mineralpedia
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Phurcalite

#55151
Locality
Merrivale quarry, Dartmoor, Devon, England 
Formula
Ca2(UO2)3O2(PO4)2·7H2
Availability
Sold
Size
8 x 8 x 4 cm - Sm Cabinet 
Tagged
phosphate  
Special Info
Radioactive!! 

Tiny yellow acicular crystals across large face. Comes with a Richard Barstow label indicating that it is an "unknown yellow uranium mineral". zsee the prov tab for label.


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
Special Info
Radioactive!!

Polybasite

on Quartz - #BN55200
Locality
Guanajuato, Guanajuato, Mexico 
Formula
Cu(Ag,Cu)6Ag9Sb2S11 
Availability
Sold
Size
6.5 x 5.5 x 3 cm - Sm Cabinet 
Tagged
sulfide , copper , silver  

A few areas show good crystals, staked to 5 or 6mm across. The Polybasite is draped around the Quartz. 


Polybasite

Formula
Cu(Ag,Cu)6Ag9Sb2S11 
Crystal System
Monoclinic 
Crystal Habit
Massive - Granular, Granular, Pseudo Hexagonal 
Cleavage
Poor, None, None 
Luster
Sub Metallic 
Color
black, dark ruby red 
Streak
reddish black 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
2.5-3 
Collection
Dr. Buford Nichols Collection

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