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Mixed Minerals

Friday, 19 November 2021 07:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including dumortierite, eudialyte, guerinite, gutsevichite, hewettite, and hubnerite and more from places like Dehesa, San Diego Co., California, United States, Kipawa alkaline complex, Quebec, Canada, Salsigne mine, Salsigne, Aude, France, Long Park, Montrose Co., Colorado, United States, Minas Ragra, Huayllay dist., Pasco dept., Peru, and Yukon Tunnel, Silverton dist., San Juan Co., Colorado, United States.

Dumortierite

#BW57010
Locality
Dehesa, San Diego Co., California, United States 
Formula
(Al,□)Al6BSi3O16(O,OH)2 
Availability
Sold
Size
3 x 3 x 4 cm - Miniature 

Long wispy divergent crystals in matrix. This is a typical color for Dumortierite.

As a side note, near the Couer-Rochester silver mine near Lovelock, Nevada is a large deposit of Dumortierite. Lilac purple boulders lay on the surface, and it seems to become a darker purple upon long-term weathering. Some of the boulders were polished by cattle rubbing against them over the many years! Not far from this mountain is the old Champion mine, which was mined for the high content of aluminum in Dumortierite for their spark plugs (the Champion SparkPlug).


Dumortierite

Formula
(Al,[ ])Al6BSi3O16(O,OH)2 
Crystal System
Orthorhombic 
Crystal Habit
Columnar, Fibrous, Prismatic 
Cleavage
Good, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
blue, brown, violet, greenish blue, pink 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Fibrous 
Hardness
8.5 
Collection
Bill Wilson Collection

Eudialyte

with Gittinsite - #BW57002
Locality
Kipawa alkaline complex, Quebec, Canada 
Formula
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 
Availability
Sold
Size
5 x 4 x 3.5 cm - Miniature 

Red crystalline Eudialyte with chalky Gittinsite.


Eudialyte

Formula
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 
Crystal System
Trigonal 
Crystal Habit
Massive - Granular, Tabular 
Cleavage
Imperfect, None, None 
Luster
Vitreous (Glassy) 
Color
pinkish red, red, yellow, yellowish brown, violet 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Uneven 
Hardness
5-5.5 
Collection
Bill Wilson Collection
Mineralpedia
View Eudialyte
On Dakota Matrix
Previously Sold Eudialyte
On Dakota Matrix
Other Available Eudialyte
WebMineral
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Mindat
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Guerinite

with Picropharmacolite - #BW57003
Locality
Salsigne mine, Salsigne, Aude, France 
Formula
Ca5(AsO3OH)2(AsO4)2·9H2
Availability
Available
Price
$45.00
Size
4 x 3 x 2.5 cm - Miniature 
Tagged
arsenate  

Colorless tabular crystals to 0.75mm of Guerinite with beautiful sprays of snow white Picropharmacolite to 4mm across.


Guerinite

Formula
Ca5(AsO3OH)2(AsO4)2·9H2
Crystal System
Monoclinic 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
colorless, white 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
1.5 
Collection
Bill Wilson Collection

Gutsevichite

#BW57009
Locality
Long Park, Montrose Co., Colorado, United States 
Formula
Al3(PO4)2(OH)3 · 8H2
Availability
Sold
Size
4 x 2.5 x 3 cm - Miniature 
Special Info
Discredited 

Olive green to white waxy coatings on a sandstone matrix.


Gutsevichite

Formula
Al3(PO4)2(OH)3�8(H2O) 
Crystal System
Isometric 
Crystal Habit
Encrustations, Concretionary 
Luster
Waxy 
Color
greenish brown, yellow green, dark brown 
Streak
white 
Class
Isometric 
Hardness
2.5 
Collection
Bill Wilson Collection
Special Info
Discredited
SOLD
Hewettite - 57004
Hewettite - 57004

Hewettite

#57004
Locality
Minas Ragra, Huayllay dist., Pasco dept., Peru 
Formula
CaV5+6O16·9H2
Availability
Sold
Size
6 x 1.5 x 1.5 cm - Sm Cabinet 
Tagged
vanadium  
Special Info
Type Locality 

Rusty red loose masses in vial.


Hewettite

Formula
CaV5+6O16·9H2
Crystal System
Monoclinic 
Crystal Habit
Acicular 
Luster
Silky 
Color
red 
Streak
brownish red 
Class
Monoclinic - Prismatic 
Hardness
Collection
Bill Wilson Collection
Special Info
Type Locality
Mineralpedia
View Hewettite
On Dakota Matrix
Previously Sold Hewettite
On Dakota Matrix
Other Available Hewettite
WebMineral
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Mindat
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Hubnerite

in Quartz - #AH56981
Locality
Yukon Tunnel, Silverton dist., San Juan Co., Colorado, United States 
Formula
CaTiSiO5 
Availability
Available
Price
$40.00
Size
4 x 4 x 4.5 cm - Miniature 

Reddish brown plates of Hubneite to 1cm in a vein Quartz with sulfides.


Hubnerite

Formula
Mn2+WO4 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Lamellar, Massive - Granular 
Cleavage
Perfect, None, None 
Luster
Sub Metallic 
Color
brown, reddish brown, brownish black 
Streak
reddish brown 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
4.5 
Collection
Arnold G Hampson Collection
Mineralpedia
View Hubnerite
On Dakota Matrix
Previously Sold Hubnerite
On Dakota Matrix
Other Available Hubnerite
WebMineral
View Hubnerite
Mindat
View Hubnerite

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