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Mixed Minerals

Sunday, 13 September 2020 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including copper, covellite, elbaite, fairfieldite, fluorite and more from places like Ray mine, Pinal Co., Arizona, United States, Golconda vein, Summitville dist., Rio Grande Co., Colorado, United States, Mesa Grande Mining dist., San Diego County, California, United States, Foote mine, Cleveland Co., North Carolina, United States, Weardale, North Pennines, Co. Durham, England, and Nancy Hanks mine, Unaweep Canyon, Mesa Co., Colorado, United States.

Copper

with Silver - #WR54058
Locality
Ray mine, Pinal Co., Arizona, United States 
Formula
Cu 
Availability
Available
Price
$295.00
Size
14 x 7 x 2 cm - Cabinet 
Tagged
native element  

Superb arborescent Copper crystals composed of thousands of 1mm Copper crystals. On the Copper are good wire and compact Silver crystals


Copper

Formula
Cu 
Crystal System
Isometric 
Crystal Habit
Nodular, Arborescent 
Cleavage
None, None, None 
Luster
Metallic 
Color
brown, copper red, light pink, red 
Streak
rose 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
Collection
Willard L. Roberts Collection
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Covellite

#AH54070
Locality
Golconda vein, Summitville dist., Rio Grande Co., Colorado, United States 
Formula
CuS 
Availability
Sold
Size
14 x 8 x 6 cm - Cabinet 
Tagged
sulfide , copper  

Large specimen of cleavable indigo purple Covellite. Some areas are tarnished nicely to a brassy iridescent color.


Covellite

Formula
CuS 
Crystal System
Hexagonal 
Crystal Habit
Platy, Foliated 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
indigo blue, light blue, dark blue, black 
Streak
black gray 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Brittle 
Hardness
1.5-2 
Collection
Arnold G Hampson Collection
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Elbaite

tourmaline - #WR54049
Locality
Mesa Grande Mining dist., San Diego County, California, United States 
Formula
Na(Al1.5Li1.5)Al6(BO3)3Si6O18(OH)4 
Availability
Available
Price
$350.00
Size
4.5 x 1.5 x 1.2 cm - Miniature 
Tagged
pegmatite mineral  

Red, striated, crystal with pyramidal termination. Good piece, solid color.


Elbaite

Formula
Na(Al1.5Li1.5)Al6(BO3)3Si6O18(OH)4 
Crystal System
Trigonal 
Crystal Habit
Striated, Prismatic 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
blue, colorless, green, yellow, white 
Streak
white 
Class
Trigonal - Ditrigonal Pyramidal 
Fracture
Sub Conchoidal 
Hardness
7.5 
Collection
Willard L. Roberts Collection
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Fairfieldite

with Fluorapatite - #DP54038
Locality
Foote mine, Cleveland Co., North Carolina, United States 
Formula
Ca2Mn2+(PO4)2·2H2
Availability
Sold
Size
6.5 x 4 x 4 cm - Sm Cabinet 
Tagged
phosphate  

These are some of the largest Fairfieldite crystals I have come across - they measure up to 7mm. The Fluorapatite is a bonus, which is up to 7mm but mostly concealed. Excellent specimen. 


Fairfieldite

Formula
Ca2Mn2+(PO4)2·2H2
Crystal System
Triclinic 
Crystal Habit
Foliated, Fibrous, Euhedral Crystals 
Cleavage
Perfect, Distinct, None 
Luster
Vitreous - Pearly 
Color
greenish white, white, light yellow 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle - Uneven 
Hardness
3.5 
Collection
Don Phillips Collection

Fluorite

#43792
Locality
Weardale, North Pennines, Co. Durham, England 
Formula
CaF2 
Availability
Available
Price
$75.00
Size
9 x 4.5 x 3.5 cm - Sm Cabinet 
Special Info
Fluorescent 

Light purple cubic crystals from 8 to 33mm with vivid blue fluorescence as see.


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
Special Info
Fluorescent
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Fluorite

with Quartz (amethyst) - #AH54059
Locality
Nancy Hanks mine, Unaweep Canyon, Mesa Co., Colorado, United States 
Formula
CaF2 
Availability
Available
Price
$85.00
Size
6.5 x 5.5 x 4 cm - Sm Cabinet 

This is one of the better Colorado localities for green Fluorite which occurs with amethyst. 


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
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