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Mixed Minerals

Friday, 14 April 2017 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including cuprite, decrespignyite-(y), fairfieldite, kovdorskite, lazulite, and ruifrancoite and more from places like Ray mine area, Pinal Co., Arizona, United States, Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia, Foote mine, Cleveland Co., North Carolina, United States, Iron mine, Kovdor Massif, Kola Peninsula, Russia, Rapid Creek, Yukon Territory, Canada, and Sapucaia mine, Galileia, Doce valley, Minas Gerais, Brazil.

Cuprite

var. chalcotrichite - #BN46752
Locality
Ray mine area, Pinal Co., Arizona, United States 
Formula
Cu1+2
Availability
Available
Price
$55.00
Size
6.5 x 4.5 x 2.5 cm - Sm Cabinet 
Tagged
copper  

Red acicular groups of chalcotrichite, a variety of Cuprite.


Cuprite

Formula
Cu1+2
Crystal System
Isometric 
Crystal Habit
Massive - Granular, Capillary 
Cleavage
Imperfect, None, None 
Luster
Adamantine 
Color
brown red, purple red, red, black 
Streak
brownish red 
Class
Isometric - Hexoctahedral 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
Collection
Dr. Buford L. Nichols Collection
Mineralpedia
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Decrespignyite-(Y)

#36359
Locality
Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia 
Formula
Y4Cu(CO3)4Cl(OH)5·2H2
Availability
Available
Price
$50.00
Size
7 x 4.5 x 1 cm - Sm Cabinet 
Tagged
carbonate , copper , REE mineral  
Special Info
Type Locality 

Rich blue coatings on front and back.


Decrespignyite-(Y)

Formula
Y4Cu(CO3)4Cl(OH)5·2H2
Crystal System
Monoclinic 
Crystal Habit
Efflorescences, Globular 
Cleavage
None, None, None 
Luster
Vitreous - Pearly 
Color
intense royal blue, turquoise blue 
Streak
pale blue 
Class
Monoclinic 
Hardness
Special Info
Type Locality

Fairfieldite

#BN46756
Locality
Foote mine, Cleveland Co., North Carolina, United States 
Formula
Ca2Mn2+(PO4)2·2H2
Availability
Available
Price
$125.00
Size
9 x 5 x 1.5 cm - Sm Cabinet 
Tagged
phosphate , pegmatite mineral  

Foote mine may hold the record for the size of Fairfieldite crystals. This specimen is no exception with groups of platy Fairfieldite to 7mm. Ordinarily the species is found in the 1-2mm range.


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

Kovdorskite

#BN46757
Locality
Iron mine, Kovdor Massif, Kola Peninsula, Russia 
Formula
Mg2PO4(OH)·3H2
Availability
Available
Price
$75.00
Size
2.5 x 3 x 2 cm - Thumbnail 
Tagged
phosphate , pegmatite mineral  
Special Info
Type & Only Locality 

Blue, glassy crystal grains from 5-11mm. Kovdorskite is a very rare mineral found at this locality only where it occurs in an explosive breccia pipe intruded through an iron deposit. Note labels.


Kovdorskite

Formula
Mg2PO4(OH)·3H2
Crystal System
Monoclinic 
Cleavage
None, None, None 
Color
colorless, greenish blue, light pink, pink 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal - Uneven 
Hardness
Collection
Dr. Buford L. Nichols Collection
Special Info
Type & Only Locality

Lazulite

#36321
Locality
Rapid Creek, Yukon Territory, Canada 
Formula
MgAl2(PO4)2(OH)2 
Availability
Available
Price
$1,950.00
Size
6 x 3 x 3 cm - Sm Cabinet 
Tagged
phosphate  

A superb Lazulite with very lustrous and deep blue with parts showing a good green color. The crystals are huge for the species, the largest eing 1.2cm! This is an excellent piece, very showy for this a rare phosphate mineral.


Lazulite

Formula
MgAl2(PO4)2(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Massive - Granular, Pyramidal 
Cleavage
Indistinct, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
blue, blue green, light blue, black blue 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
5-6 
Mineralpedia
View Lazulite
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Ruifrancoite

with Meurigite - #BN46748
Locality
Sapucaia mine, Galileia, Doce valley, Minas Gerais, Brazil 
Formula
Ca22Fe3+4Be4(PO4)6(OH)6·4H2
Availability
Available
Price
$95.00
Size
4 x 3 x 2 cm - Miniature 
Tagged
phosphate , beryllium , pegmatite mineral  
Special Info
Type Locality 

Brownish red spherical crystal groups to about 0.75mm. There are also yellowish green fuzzy, spherical Meurigite crystals on top of the Ruifrancoite. The matrix is cleavelandite Albite. There are only two localities where Ruifrancoite is found. This is the type locality.


Ruifrancoite

Formula
Ca2[ ]2Fe3+4Be4(PO4)6(OH)6·4H2
Crystal System
Monoclinic 
Crystal Habit
Acicular, Lath, Botryoidal 
Cleavage
Perfect, Good, None 
Color
reddish brown 
Streak
orange brown 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
4.5 
Collection
Dr. Buford L. Nichols Collection
Special Info
Type Locality

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