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Mixed Minerals

Sunday, 27 December 2020 07:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including eudialyte, fluorite, gypsum, helvine, labuntsovite-mn, and londonite and more from places like Mont Saint-Hilaire, Rouville Co., Quebec, Canada, Mina Ojuela, Mapimi, Durango, Mexico, Naica, Mun. de Saucillo, Chihuahua, Mexico, Sunnyside mine, Silverton, San Juan Co., Colorado, United States, and Antsongomvato mine, Betroka dist., Antananarivo, Madagascar.

Eudialyte

#DC54866
Locality
Mont Saint-Hilaire, Rouville Co., Quebec, Canada 
Formula
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 
Availability
Sold
Size
6 x 6 x 2.5 cm - Sm Cabinet 

A 6mm red Eudialyte crystal in vug with several smaller embedded in the matrix.


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
Don Cooke 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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Fluorite

with Calcite - #AH54903
Locality
Mina Ojuela, Mapimi, Durango, Mexico 
Formula
CaF2 
Availability
Available
Price
$60.00
Size
10 x 8 x 5 cm - Cabinet 

Very faint purple Fluorite crystals to 4cm on edge with an interesting silky luster from countless parallel overgrowths. On the right side is a group of Calcite crystals with rhombic crystals to 5mm.


Fluorite

Formula
CaF2 
Crystal System
Isometric 
Crystal Habit
Crystalline - Coarse, Massive - Granular, Disseminated 
Cleavage
Three perfect, octahedral cleavages. 
Luster
Vitreous (Glassy) 
Color
purple, clear, yellow, green, red, blue 
Streak
white 
Geological Setting
Occurs in a wide range of geologic environments including low temperature Missississippi Valley lead-zinc deposits, hydrothermal gold deposits, Alpine cleft metamorphic environments  
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
View Fluorite
On Dakota Matrix
Previously Sold Fluorite
On Dakota Matrix
Other Available Fluorite
WebMineral
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Mindat
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Gypsum

var. selenite - #AH54897
Locality
Naica, Mun. de Saucillo, Chihuahua, Mexico 
Formula
CaSO4·2H2
Availability
Sold
Size
18 x 7 x 6 cm - Cabinet 

A large cabinet specimen of selenite, the clear variety of Gypsum. The specimen is nearly perfect with some faces being transparent and giving you an opportunty to view inside of this amazing piece. If you look close enough, you will see phantom crystal faces inside. You will also see little reindeer with a sled attached and Santa waiving hello. Shake it, and it snows.


Gypsum

Formula
CaSO4·2H2
Crystal System
Monoclinic 
Crystal Habit
Tabular, Crystalline - Coarse, Massive - Fibrous 
Cleavage
Perfect, Distinct, Distinct 
Luster
Pearly 
Color
white, colorless, yellowish white, greenish white, brown 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Fibrous 
Hardness
Collection
Arnold G Hampson Collection
On Dakota Matrix
Previously Sold Gypsum
On Dakota Matrix
Other Available Gypsum
WebMineral
View Gypsum
Mindat
View Gypsum

Helvine

with Pyroxmangite - #AH53963
Locality
Sunnyside mine, Silverton, San Juan Co., Colorado, United States 
Formula
Mn2+4(BeSiO4)3
Availability
Sold
Size
5.5 x 5 x 2.5 cm - Sm Cabinet 
Tagged
beryllium  

Yellow Helvine with pink Pyroxmangite. No crystals.


Helvine

Collection
Arnold G Hampson Collection
On Dakota Matrix
Previously Sold Helvine
On Dakota Matrix
Other Available Helvine
WebMineral
View Helvine
Mindat
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Labuntsovite-Mn

#DC54863
Locality
Mont Saint-Hilaire, Rouville Co., Quebec, Canada 
Formula
Na4K4Mn2+2Ti8O4(Si4O12)4(OH)4·10-12H2
Availability
Sold
Size
5 x 4 x 2.5 cm - Miniature 

Rich specimen of Labuntsovite with a large group to 5mm and singles and sprays a bit smaller. Very nice, enjoyable specimen.


Labuntsovite-Mn

Formula
Na4K4Mn2+2Ti8O4(Si4O12)4(OH)4·10-12H2
Crystal System
Monoclinic 
Crystal Habit
Prismatic 
Cleavage
Perfect, None, None 
Luster
Greasy (Oily) 
Color
brownish yellow, pink, reddish brown 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Subconchoidal 
Hardness
Collection
Don Cooke Collection

Londonite

#50550
Locality
Antsongomvato mine, Betroka dist., Antananarivo, Madagascar 
Formula
CsBe5Al4B11O28 
Availability
Sold
Size
6 x 4 x 4 cm - Sm Cabinet 
Tagged
beryllium , pegmatite mineral  

A large, euhedral crystal to 1.1cm with sharp faces and nice light green color. Londonite contains Cesium and Beryllium and is very rare. The specimen itself is from Dr. David London with analytical information.


Londonite

Formula
CsBe5Al4B11O28 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, white, yellow 
Streak
white 
Class
Isometric - Hextetrahedral 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Dr. David London Collection
Mineralpedia
View Londonite
On Dakota Matrix
Previously Sold Londonite
On Dakota Matrix
Other Available Londonite
WebMineral
View Londonite
Mindat
View Londonite

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