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Mixed Minerals

Friday, 31 March 2017 12:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including chalcopyrite, fairfieldite, fluorapatite, liebenbergite, and natrolite and more from places like Casapalca, Lima Dept., Peru, Jocão pegmatite, Conselheiro Pena, Doce valley, Minas Gerais, Brazil, Kamariza mine, Laurium, Greece, and Big Rock quarry, Little Rock, Pulaski Co., Arkansas, United States.

Chalcopyrite

with Sphalerite - #46706
Locality
Casapalca, Lima Dept., Peru 
Formula
Cu1+Fe3+S2 
Availability
Available
Price
$395.00
Size
14 x 9 x 5.5 cm - Cabinet 
Tagged
sulfide , copper  

Large crystals of Chalcopyrite to over 3cm on black, shiny Sphalerite crystals. This is a fabulous sufide specimen. May cost extra to ship.


Chalcopyrite

Formula
Cu1+Fe3+S2 
Crystal System
Tetragonal 
Crystal Habit
Euhedral Crystals, Striated, Druse 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
brass yellow, honey yellow 
Streak
greenish black 
Class
Tetragonal - Scalenohedral 
Fracture
Brittle 
Hardness
3.5 

Fairfieldite

on Albite - #BN46692
Locality
Jocão pegmatite, Conselheiro Pena, Doce valley, Minas Gerais, Brazil 
Formula
Ca2Mn2+(PO4)2·2H2
Availability
Available
Price
$50.00
Size
6 x 5 x 4 cm - Sm Cabinet 
Tagged
phosphate , pegmatite mineral  

Greyish spheroidal crystal groups to 2mm on colorless to white bladed Albite var. cleavelandite with Muscovite.


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
Dr. Buford L. Nichols Collection

Fluorapatite

#BN46708
Locality
Minas Gerais, Brazil 
Formula
Ca5(PO4)3
Availability
Available
Price
$1,950.00
Size
9 x 6.5 x 4 cm - Sm Cabinet 
Tagged
phosphate , pegmatite mineral  

Cabinet specimen with a large, lustrous, discoidal pink crystal 5cm across, perfectly perched on Muscovite-Quartz matrix. Beautiful specimen, no damage.


Fluorapatite

Formula
Ca5(PO4)3
Crystal System
Hexagonal 
Crystal Habit
Massive - Granular, Euhedral Crystals 
Cleavage
Indistinct, None, None 
Luster
Vitreous - Resinous 
Color
blue, brown, colorless, violet, green 
Streak
white 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Dr. Buford L. Nichols Collection

Liebenbergite

#44141
Locality
Kamariza mine, Laurium, Greece 
Formula
Ni2SiO4 
Availability
Available
Price
$95.00
Size
2.5 x 2 x 1.5 cm - Thumbnail 

Tiny green micro crystals, less than 0.5mm, with triangular faces showing on a few crystals. Scattered coverage throughout the porous mass. Liebenbergite is a fairly rare mineral.


Liebenbergite

Formula
Ni2SiO4 
Crystal System
Orthorhombic 
Luster
Vitreous - Greasy 
Color
yellow green 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Hardness

Natrolite

with Aegerine - #DO46115
Locality
Big Rock quarry, Little Rock, Pulaski Co., Arkansas, United States 
Formula
Na2(Si3Al2)O10·2H2
Availability
Available
Price
$125.00
Size
13 x 6.5 x 5 cm - Cabinet 
Tagged
zeolite  

Excellent colorless crystals of Natrolite from 1 to 11mm showing nice terminations and associated with black Aegerine.


Natrolite

Formula
Na2(Si3Al2)O10·2H2
Crystal System
Orthorhombic 
Crystal Habit
Acicular, Prismatic, Nodular 
Cleavage
Perfect, Imperfect, None 
Luster
Vitreous - Silky 
Color
white, colorless, red, yellowish white, reddish white 
Streak
white 
Class
Orthorhombic - Pyramidal 
Fracture
Brittle 
Hardness
5.5-6 
Collection
Don Owens Collection
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