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Mixed Minerals

Friday, 10 March 2017 08:00 AM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including lipscombite, mesolite, nagelschmidtite, pyrite, and scholzite and more from places like Buranga pegmatite, Gatumba dist., Western Prov., Rawanda, Benton Co., Oregon, United States, Hatrurim Formation, Negev, Isreal, Gavorrano mine, Gavorrano, Grosseto, Tuscany, Italy, and Reaphook Hill, Flinders Ranges, South Australia, Australia.

Lipscombite

with Phosphosiderite - #46535
Locality
Buranga pegmatite, Gatumba dist., Western Prov., Rawanda 
Formula
Fe2+Fe3+2(PO4)2(OH)2 
Availability
Available
Price
$30.00
Size
5.5 x 4 x 3 cm - Sm Cabinet 
Tagged
phosphate , pegmatite mineral  

This is just an altered phosphate chunk showing a few zones of minerals. The purple is  the Phosphosiderite, while the yellow is Lipscombite.


Lipscombite

Formula
Fe2+Fe3+2(PO4)2(OH)2 
Crystal System
Tetragonal 
Color
green gray, olive green, black 
Class
Tetragonal - Trapezohedral 
Hardness
Collection
Dr. Buford L. Nichols Collection

Mesolite

with Calcite - #PD46564
Locality
Benton Co., Oregon, United States 
Formula
Na2Ca2(Si9Al6)O30·8H2
Availability
Available
Price
$40.00
Size
7 x 6 x 4.5 cm - Sm Cabinet 
Tagged
zeolite  

Silky, fine needles of Mesolite covering Calcite.


Mesolite

Formula
Na2Ca2(Si9Al6)O30·8H2
Crystal System
Monoclinic 
Crystal Habit
Acicular, Capillary, Spherical 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous - Silky 
Color
white, gray, pale yellow 
Streak
white 
Class
Monoclinic - Sphenoidal 
Fracture
Uneven 
Hardness
Collection
Phillips Collection
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Nagelschmidtite

#BN46549
Locality
Hatrurim Formation, Negev, Isreal 
Formula
Ca7(SiO4)2(PO4)2 
Availability
Available
Price
$225.00
Size
Micromount 
Tagged
phosphate  
Special Info
Type Locality 
Special Info
EDS Confirmed 

Brownish orange glassy thin section of Nagelschmidtite, a very rare phosphate. The mineral is found in the sedimentary rock of the Hatrurim Fm. The phosphate formed in a high temperture environment created by burning coal beds.This specimen is a microprobe mount and the actual specimen is a thin section of 5mm glued by epoxy onto the glass. So obviously it has been verified perhaps even a co-type, though there is no paperwork to that claim.


Nagelschmidtite

Formula
Ca7(SiO4)2(PO4)2 
Crystal System
Hexagonal 
Crystal Habit
Anhedral Grains 
Cleavage
Good, None, None 
Luster
Vitreous (Glassy) 
Color
brown, colorless, yellowish white, light yellow 
Streak
white 
Class
Hexagonal 
Hardness
Collection
Dr. Buford L. Nichols Collection
Special Info
Type Locality
Special Info
EDS Confirmed

Pyrite

#BN46539
Locality
Gavorrano mine, Gavorrano, Grosseto, Tuscany, Italy 
Formula
FeS2 
Availability
Available
Price
$35.00
Size
4.5 x 4.5 x 4.5 cm - Miniature 
Tagged
sulfide  

This Pyrite is somewhat worn, but I thought I would post it for its locality. It is a large single crystal with several smaller Klingons.


Pyrite

Formula
FeS2 
Crystal System
Isometric 
Crystal Habit
Striated, Druse, Stalactitic 
Cleavage
Poor, Poor, None 
Luster
Metallic 
Color
pale brass yellow 
Streak
greenish black 
Class
Isometric - Diploidal 
Fracture
Conchoidal 
Hardness
6.5 
Collection
Dr. Buford L. Nichols Collection
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Scholzite

#BN46567
Locality
Reaphook Hill, Flinders Ranges, South Australia, Australia 
Formula
CaZn2(PO4)2·2H2
Availability
Available
Price
$250.00
Size
9 x 7 x 7 cm - Sm Cabinet 
Tagged
phosphate  

Colorless prismatic crystals to 1cm. This is a very rich specimen as the photos show.


Scholzite

Formula
CaZn2(PO4)2·2H2
Crystal System
Orthorhombic 
Cleavage
Parting, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, gray white, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
Collection
Dr. Buford L. Nichols Collection
Mineralpedia
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