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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 kovdorskite, and ruifrancoite and more from places like Iron mine, Kovdor Massif, Kola Peninsula, Russia, and Sapucaia mine, Galileia, Doce valley, Minas Gerais, Brazil.

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

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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