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Mixed Minerals

Friday, 09 October 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 diopside, dioptase, elbaite, and enargite and more from places like Outokumpu, Finland, Goodsprings dist., Clark Co., Nevada, United States, Himalaya mine, San Diego Co., California, United States, Black Mountain pegmatite, Rumford, Oxford Co., Maine, United States, Pala dist., San Diego Co., California, United States, and Longfellow mine, Red Mountain, San Juan Co., Colorado, United States.

Diopside

(chrome) with Pyrite - #BN54195
Locality
Outokumpu, Finland 
Formula
CaMgSi2O6 
Availability
Sold
Size
2.5 x 1.5 x 1.5 cm - Thumbnail 

A 1.5cm green translucent, prismatic crystal of chromian Diopside in sulfide matrix.


Diopside

Formula
CaMgSi2O6 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Blocky, Granular 
Cleavage
Good, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
blue, brown, colorless, green, gray 
Streak
white green 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Dr. Buford Nichols Collection
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SOLD
Dioptase - 36772
Dioptase - 36772

Dioptase

#36772
Locality
Goodsprings dist., Clark Co., Nevada, United States 
Formula
CuSiO3·H2
Availability
Sold
Size
4 x 3.5 x 3 cm - Miniature 

Tiny, less than 1mm Dioptase crystals. 


Dioptase

Formula
CuSiO3·H2
Crystal System
Trigonal 
Crystal Habit
Massive, Cryptocrystalline, Crystalline - Coarse 
Cleavage
Good, None, None 
Luster
Vitreous (Glassy) 
Color
dark blue green, emerald green, turquoise 
Streak
green 
Class
Trigonal - Rhombohedral 
Fracture
Conchoidal 
Hardness
Mineralpedia
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Elbaite

in Quartz - #AH54076
Locality
Himalaya mine, San Diego Co., California, United States 
Formula
Na(Al1.5Li1.5)Al6(BO3)3Si6O18(OH)4 
Availability
Sold
Size
10 x 8 x 3 cm - Cabinet 
Tagged
pegmatite mineral  

Tourmaline crystals with cores of Schorl and outer perimeter of pinkish Elbaite.. There is one crystal of Schorl which appear as three crystals grown in parallel. Mineralogically interesting and good study piece for crystal growth habits in a pegmatite. 


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
Arnold G Hampson Collection
Mineralpedia
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Elbaite

var. rubelite - #AH54221
Locality
Black Mountain pegmatite, Rumford, Oxford Co., Maine, United States 
Formula
Na(Al1.5Li1.5)Al6(BO3)3Si6O18(OH)4 
Availability
Sold
Size
8 x 4 x 2 cm - Sm Cabinet 
Tagged
pegmatite mineral  

Cool columnar piece with slight pink zones, but the remainder is yellow.


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
Arnold G Hampson Collection
Mineralpedia
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Elbaite

var. rubellite - #AH54237
Locality
Pala dist., San Diego Co., California, United States 
Formula
Na(Al1.5Li1.5)Al6(BO3)3Si6O18(OH)4 
Availability
Sold
Size
4 x 4 x 0.4 cm - Miniature 
Tagged
pegmatite mineral  

A raspberry red slice of Elbaite, variety rubellite.


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
Arnold G Hampson Collection
Mineralpedia
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Enargite

#AH54067
Locality
Longfellow mine, Red Mountain, San Juan Co., Colorado, United States 
Formula
Cu3AsS4 
Availability
Sold
Size
7.5 x 6 x 4 cm - Sm Cabinet 
Tagged
sulfide , copper  

Hampson collected this specimen in 1961. It is full of Quartz lined pockets filled with tiny 1-2 mm sharp Enargite crystals.


Enargite

Formula
Cu3AsS4 
Crystal System
Orthorhombic 
Crystal Habit
Euhedral Crystals, Massive - Granular, Prismatic 
Cleavage
Perfect, Distinct, Distinct 
Luster
Metallic 
Color
steel gray, blackish gray, violet black 
Streak
black 
Class
Orthorhombic - Pyramidal 
Fracture
Uneven 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
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Previously Sold Enargite
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Mindat
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