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Mixed Fine and Rare Minerals

Friday, 19 March 2021 07:00 PM

Introducing the "Mixed Fine and Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including adamite, beryl, crandallite, pyrrhotite, and shattuckite and more from places like Mina Ojuela, Mapimi, Durango, Mexico, Stak Nala, Gilgit, Skardu road, Northern Areas, Pakistan, Governado Valadares, Minas Gerais, Brazil, Little Green Monster mine, Clay Canyon, Fairfield, Utah Co., Utah, United States, Santa Eulalia, Chihuahua, Mexico, and Ajo, Pima Co., Arizona, United States.

Adamite

#55311
Locality
Mina Ojuela, Mapimi, Durango, Mexico 
Formula
Zn2AsO4(OH) 
Availability
Available
Price
$40.00
Size
7 x 5.5 x 3.5 cm - Sm Cabinet 
Tagged
arsenate  

Purple manganoan Adamite with crystals to 4mm accompanied by a bit of sugery green Austinite.


Adamite

Formula
Zn2AsO4(OH) 
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Druse, Encrustations 
Cleavage
One Good 
Luster
Vitreous - Resinous 
Color
yellow, green, violet, pink, yellowish green 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
3.5 
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Previously Sold Adamite
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Beryl

var. aquamarine - #AH55375
Locality
Stak Nala, Gilgit, Skardu road, Northern Areas, Pakistan 
Formula
Be3Al2Si6O18 
Availability
Available
Price
$125.00
Size
3.5 x 3.5 x 3.5 cm - Miniature 
Tagged
beryllium , pegmatite mineral  

A terminated, very clear and gemmy aquamarine crystals with beveled edges to 3.5cm across.


Beryl

Formula
Be3Al2Si6O18 
Crystal System
Hexagonal 
Crystal Habit
Crystalline - Coarse, Prismatic, Columnar 
Cleavage
Imperfect, None, None 
Luster
Vitreous - Resinous 
Color
green, blue, yellow, colorless, pink 
Streak
white 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
7.5-8 
Collection
Arnold G Hampson Collection
Mineralpedia
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Previously Sold Beryl
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Beryl

var. aquamarine - #WR55401
Locality
Governado Valadares, Minas Gerais, Brazil 
Formula
Be3Al2Si6O18 
Availability
Sold
Size
6 x .9 x .7 cm - Sm Cabinet 
Tagged
beryllium , pegmatite mineral  

A long slender aquamarine crystal with a satin luster and one end nicely terminated and the other end is cut.


Beryl

Formula
Be3Al2Si6O18 
Crystal System
Hexagonal 
Crystal Habit
Crystalline - Coarse, Prismatic, Columnar 
Cleavage
Imperfect, None, None 
Luster
Vitreous - Resinous 
Color
green, blue, yellow, colorless, pink 
Streak
white 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
7.5-8 
Collection
Willard L. Roberts Collection
Mineralpedia
View Beryl
On Dakota Matrix
Previously Sold Beryl
On Dakota Matrix
Other Available Beryl
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Mindat
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Crandallite

#AH55332
Locality
Little Green Monster mine, Clay Canyon, Fairfield, Utah Co., Utah, United States 
Formula
CaAl3(PO4)(PO3OH)(OH)6 
Availability
Sold
Size
8 x 4.5 x 1 cm - Sm Cabinet 
Tagged
phosphate  

Polished slab showing the whirls and intricate nature of these intresting phosphate nodules once brought onto the market by Art Montgomery (Montgomeryite) and Ed Over (Overite). As opposed to pegmatitic phosphates formed in igneous high temperature of formation, these phosphates were formed under marine, low temperature and sedimentary environments. Sedimentary phosphates are actually termed phosphorites.


Crandallite

Formula
CaAl3(PO4)(PO3OH)(OH)6 
Crystal System
Trigonal 
Crystal Habit
Compact, Massive - Granular, Fibrous 
Cleavage
Perfect, None, None 
Luster
Vitreous - Dull 
Color
gray, yellow, yellowish white, light red 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Hardness
Collection
Arnold G Hampson Collection

Pyrrhotite

with Sphalerite and Arsenopyrite - #AH55414
Locality
Santa Eulalia, Chihuahua, Mexico 
Formula
Fe7S8 
Availability
Sold
Size
6 x 4 x 3.5 cm - Sm Cabinet 
Tagged
sulfide  

Mineralogically a cool specimen. There are plates of Pyrrhotite to 1.7mm like the one at the center. To the left of that crystal are black crystals of Sphalerite to 7mm. To the right is a spray of Quartz. Now those little reticulated crystals are prismatic Arsenopyrite, which are epitaxially oriented. Also in the hood are saddle shaped Siderite crystals and Galena which can be seen on the backside, though are not crystallized but granular. 


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
Arnold G Hampson Collection

Shattuckite

#55409
Locality
Ajo, Pima Co., Arizona, United States 
Formula
Cu5(SiO3)4(OH)2 
Availability
Sold
Size
4 x 4.5 x 3 cm - Miniature 
Tagged
copper  

Deep blue compact grains throughout the mass. It lacks the nice radial fibrous crystals however. The light blue is probably Plancheite.


Shattuckite

Formula
Cu5(SiO3)4(OH)2 
Crystal System
Orthorhombic 
Crystal Habit
Granular, Fibrous 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous (Glassy) 
Color
blue, dark blue, green 
Streak
pale blue 
Class
Orthorhombic - Dipyramidal 
Hardness

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