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Rare and Fine Minerals

Friday, 03 August 2018 06:00 PM

Introducing the "Rare and Fine Minerals " gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including carnotite, peisleyite, proustite, pyrite, tiptopite, and woodhouseite and more from places like Mrak mine, Converse Co., Wyoming, United States, Tom's Phosphate quarry, Kapunda, South Australia, Australia, Měděnec, Erzgebirge, Bohemia, Czech Republic, Martin Marietta, Magnet Cove, Hot Spring Co., Arkansas, United States, Tip Top mine, Custer Co., South Dakota, United States, and Champion mine, Mono Co., California, United States.

Carnotite

#BN49607
Locality
Mrak mine, Converse Co., Wyoming, United States 
Formula
K2(UO2)2(VO4)2·3H2
Availability
Available
Price
$25.00
Size
4.5 x 2.5 x 2 cm - Miniature 
Tagged
vanadium  

Yellow powdery Carnotite in sandstone. 


Carnotite

Formula
K2(UO2)2(VO4)2·3H2
Crystal System
Monoclinic 
Crystal Habit
Earthy, Encrustations, Platy 
Cleavage
Perfect, None, None 
Luster
Pearly 
Color
yellow, golden yellow, greenish yellow 
Streak
light yellow 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
Collection
Dr. Buford Nichols Collection

Peisleyite

#BN49619
Locality
Tom's Phosphate quarry, Kapunda, South Australia, Australia 
Formula
Na3Al16(PO4)10(SO4)2(OH)17·20H2
Availability
Available
Price
$20.00
Size
0.7 x 0.5 x 0.3 cm - Thumbnail 
Tagged
phosphate  

White earthy mass. Small specimen!


Peisleyite

Formula
Na3Al16(PO4)10(SO4)2(OH)17·20H2
Crystal System
Monoclinic 
Crystal Habit
Compact 
Luster
Earthy (Dull) 
Color
white 
Streak
white 
Class
Monoclinic 
Hardness
Collection
Dr. Buford Nichols Collection

Proustite

on Arsenic - #RW48599
Locality
Měděnec, Erzgebirge, Bohemia, Czech Republic 
Formula
Ag3AsS3 
Availability
Available
Price
$325.00
Size
5.5 x 4 x 3.5 cm - Sm Cabinet 
Tagged
sulfide , silver  

Ruby red, prismatic crystals or Proustite to 3mm lining a vug filled with native, dull grey Arsenic and Arsenopyrite. Excellent specimen.


Proustite

Formula
Ag3AsS3 
Crystal System
Trigonal 
Crystal Habit
Massive, Crystalline - Poor, Blocky 
Cleavage
None, None, None 
Luster
Sub Metallic 
Color
vermilion, reddish gray 
Streak
vermilion red 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Sectile 
Hardness
2-2.5 
Collection
Robert J. Waidler Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Proustite
On Dakota Matrix
Other Available Proustite
WebMineral
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Mindat
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Pyrite

#DO49280
Locality
Martin Marietta, Magnet Cove, Hot Spring Co., Arkansas, United States 
Formula
FeS2 
Availability
Available
Price
$25.00
Size
1.7 x 1.5 x 1.6 cm - Thumbnail 
Tagged
sulfide  

A representative Pyrite from this important deposit. 


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
Don Owens Collection
Mineralpedia
View Pyrite
On Dakota Matrix
Previously Sold Pyrite
On Dakota Matrix
Other Available Pyrite
WebMineral
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Mindat
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Tiptopite

with Roscherite - #BN49606
Locality
Tip Top mine, Custer Co., South Dakota, United States 
Formula
K2(Li,Na,Ca)6(Be6P6)O24(OH)2·1.3H2
Availability
Sold
Size
8 x 5.5 x 2.5 cm - Sm Cabinet 
Tagged
phosphate , beryllium , pegmatite mineral  
Special Info
Type & Only Locality 

Exceptional specimen with sprays of white, acicular Tiptopite to 3mm across! Tiptopite is found only at the Tip Top pegmatite, it's namesake. What makes this specimen special is the beautiful red micro crystals of Roscherite. Tiptopite can also be seen on the side and lilac Whitlockite and the flip side. Rich and rare!!


Tiptopite

Formula
K2(Li,Na,Ca)6(Be6P6)O24(OH)2·1.3H2
Crystal System
Hexagonal 
Crystal Habit
Acicular, Radial 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
colorless 
Streak
white 
Class
Hexagonal - Pyramidal 
Fracture
Uneven 
Hardness
3.5 
Collection
Dr. Buford Nichols Collection
Special Info
Type & Only Locality
Mineralpedia
View Tiptopite
On Dakota Matrix
Previously Sold Tiptopite
On Dakota Matrix
Other Available Tiptopite
WebMineral
View Tiptopite
Mindat
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Woodhouseite

#BN49571
Locality
Champion mine, Mono Co., California, United States 
Formula
CaAl3(SO4)(PO4)(OH)6 
Availability
Available
Price
$75.00
Size
7 x 4.5 x 3 cm - Sm Cabinet 
Tagged
phosphate  
Special Info
Type Locality 

Creamy pink pseudocubic rhombohedral crystals to 5mm in Quartz matrix. The Champion mine is the type locality and can be said to have the finest crystals in the world. Although there are several other deposits, it is safe to say it is the best. It is found in a variety of geological environments such as copper porphyries with argillic alteration, hot springs, iron-tin, and carbonatites, cave-guano deposits but generally deposits of high aluminum such as the Champion mine. Interestingly not in pegmatites (?). 


Woodhouseite

Formula
CaAl3(SO4)(PO4)(OH)6 
Crystal System
Trigonal 
Crystal Habit
Pseudo Cubic, Tabular 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
colorless, white, pink, pale orange 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Hardness
4.5 
Collection
Dr. Buford Nichols Collection
Special Info
Type Locality

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