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Mixed Minerals

Friday, 17 March 2017 07:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including herderite, parsonsite, sincosite and more from places like Golconda pegmatite, Governador Valadares, Doce valley, Minas Gerais, Brazil, Lachaux, Puy-de-Dôme, Auvergne, France, South Rasmussen Ridge mine, Soda Springs, Caribou Co., Idaho, United States.

Herderite

on Microcline - #BN46619
Locality
Golconda pegmatite, Governador Valadares, Doce valley, Minas Gerais, Brazil 
Formula
CaBePO4
Availability
Available
Price
$125.00
Size
11 x 6 x 6 cm - Cabinet 
Tagged
phosphate , beryllium , pegmatite mineral  

The specimen was acquired by Nichols in 1976. It is a large specimen of mostly white to light pink Microcline with yellow brown large crystals of Herderite to over 1.5cm. The Microcline appears to have been etched and brecciated by remaining fluid of the pegmatite or later hydrothermal fluids which have deposited the Herderite. Most of the Herderite are twinned. As Mindat notes, most Herderites may be Hydroxylherderite, not much of a difference however.


Herderite

Formula
CaBePO4
Crystal System
Monoclinic 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
white, yellowish white, greenish white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Sub Conchoidal 
Hardness
Collection
Dr. Buford L. Nichols Collection
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Previously Sold Herderite
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Parsonsite

#BN46604
Locality
Lachaux, Puy-de-Dôme, Auvergne, France 
Formula
Pb2(UO2)(PO4)2·0-2H2
Availability
Available
Price
$40.00
Size
4.5 x 4 x 3 cm - Miniature 
Tagged
phosphate  

Light yellow tiny, less than 1mm, acicular crystals. Sparse.


Parsonsite

Formula
Pb2(UO2)(PO4)2·0-2H2
Crystal System
Triclinic 
Crystal Habit
Microscopic Crystals, Platy, Pseudo Hexagonal 
Cleavage
Indistinct, None, None 
Luster
Subadamantine 
Color
brown, greenish brown, yellow, yellow brown, light yellow 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Conchoidal 
Hardness
2.5-3 
Collection
Dr. Buford L. Nichols Collection

Sincosite

#BN46613
Locality
South Rasmussen Ridge mine, Soda Springs, Caribou Co., Idaho, United States 
Formula
Ca(V4+O)2(PO4)2·5H2
Availability
Available
Price
$75.00
Size
6 x 4 x 2 cm - Sm Cabinet 
Tagged
phosphate , vanadium  

Bright green and olive green thin tabular Sincosite crystals too 1mm on black shale of the Phosphoria Formation.


Sincosite

Formula
Ca(V4+O)2(PO4)2·5H2
Crystal System
Tetragonal 
Crystal Habit
Scaly, Platy, Aggregates 
Cleavage
Perfect, Distinct, Poor 
Luster
Vitreous - Metallic 
Color
green, yellowish green, olive green, brownish green 
Streak
light green 
Class
Tetragonal 
Fracture
Brittle 
Hardness
1-2 
Collection
Dr. Buford L. Nichols Collection
Mineralpedia
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Previously Sold Sincosite
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Mindat
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Sincosite

#BN46614
Locality
South Rasmussen Ridge mine, Soda Springs, Caribou Co., Idaho, United States 
Formula
Ca(V4+O)2(PO4)2·5H2
Availability
Available
Price
$45.00
Size
5 x 4 x 2.5 cm - Miniature 
Tagged
phosphate , vanadium  

Light green to metallic olive green thin tabular crystals of rare Sincosite to 1mm.


Sincosite

Formula
Ca(V4+O)2(PO4)2·5H2
Crystal System
Tetragonal 
Crystal Habit
Scaly, Platy, Aggregates 
Cleavage
Perfect, Distinct, Poor 
Luster
Vitreous - Metallic 
Color
green, yellowish green, olive green, brownish green 
Streak
light green 
Class
Tetragonal 
Fracture
Brittle 
Hardness
1-2 
Collection
Dr. Buford L. Nichols Collection
Mineralpedia
View Sincosite
On Dakota Matrix
Previously Sold Sincosite
On Dakota Matrix
Other Available Sincosite
WebMineral
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Mindat
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