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Mixed Minerals

Sunday, 06 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 esperite, fluorite, kochsandorite, metavariscite, mimetite, and mohrite and more from places like Fowler quarry, Franklin, Sussex Co., New Jersey, United States, Gordonsville mine, Carthage, Smith Co., Tennessee, United States, Coal mine, Mány, Bicskei dist., Fejér Co., Hungary, Lucin Hill, Box Elder Co., Utah, United States, San Rafael mine, Nye Co., Nevada, United States, and Travale, Montieri, Grosseto, Tuscany, Italy.

Esperite

with Franklinite - #RS58748
Locality
Fowler quarry, Franklin, Sussex Co., New Jersey, United States 
Formula
PbCa2(ZnSiO4)3 
Availability
Sold
Size
6 x 6.5 x 3 cm - Sm Cabinet 

White crystalline Esperite, a rare lead-zinc silicate which fluoresces a bright stunning yellow color.


Esperite

Formula
PbCa2(ZnSiO4)3 
Crystal System
Monoclinic 
Crystal Habit
Massive 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
Collection
RC Stamberg Collection
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Fluorite

#59537
Locality
Gordonsville mine, Carthage, Smith Co., Tennessee, United States 
Formula
CaF2 
Availability
Available
Price
$75.00
Size
8 x 5.5 x 2.5 cm - Sm Cabinet 

Purple Fluorite crystals to 9mm on edge. This specimen sits well and is nicely trimmed.


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
Mineralpedia
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Kochsandorite

#BW59632
Locality
Coal mine, Mány, Bicskei dist., Fejér Co., Hungary 
Formula
CaAl2(CO3)2(OH)4·H2
Availability
Available
Price
$50.00
Size
2.5 x 2 x 1.5 cm - Thumbnail 
Tagged
carbonate  
Special Info
Type Locality 

Kochsandorite is a very rare calcium-aluminum carbonate found at only three localities in the world. At this locality it is found in a coal mine in a matrix of carbonaceous shale. The Kochsandorite is a bundle of silky fibrous crystals too small to measure.


Kochsandorite

Formula
CaAl2(CO3)2(OH)4·H2
Crystal System
Orthorhombic 
Crystal Habit
Acicular, Radial 
Cleavage
None, None, None 
Luster
Vitreous - Silky 
Color
white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
2-2.5 
Collection
Bill Wilson Collection
Special Info
Type Locality

Metavariscite

#48744
Locality
Lucin Hill, Box Elder Co., Utah, United States 
Formula
AlPO4·2H2
Availability
Available
Price
$45.00
Size
6.5 x 5 x 4 cm - Sm Cabinet 
Tagged
phosphate  

Excellent light green bladed crystals as singles and clusters.


Metavariscite

Formula
AlPO4·2H2
Crystal System
Monoclinic 
Cleavage
Good, None, None 
Luster
Vitreous (Glassy) 
Color
light green 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
3.5 

Mimetite

#59619
Locality
San Rafael mine, Nye Co., Nevada, United States 
Formula
Pb5(AsO4)3Cl 
Availability
Available
Price
$30.00
Size
4.5 x 3 x 1.5 cm - Miniature 
Tagged
arsenate  

The specimen originated from Dr. Bill Wise, the late professor of mineralogy at the University of California at Santa Barbara. He collected it in 1975. The yellow is the Mimetite, gorgeous little 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 
Mineralpedia
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Mohrite

with Carlsonite - #BW59629
Locality
Travale, Montieri, Grosseto, Tuscany, Italy 
Formula
(NH4)2Fe2+(SO4)2·6H2
Availability
Sold
Size
1.8 x 1 x 0.6 cm - Thumbnail 
Special Info
Type Locality 

Two specimens of light green, sugary and crystalline mass of Mohrite with one specimen of yellow Mohrite or Metavoltine. The larger Mohrite is 1.8cm.


Mohrite

Formula
(NH4)2Fe2+(SO4)2·6H2
Crystal System
Monoclinic 
Cleavage
Perfect, Distinct, None 
Luster
Vitreous (Glassy) 
Color
light green 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
2-2.5 
Collection
Bill Wilson Collection
Special Info
Type Locality
Mineralpedia
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On Dakota Matrix
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