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Mixed Minerals

Sunday, 15 November 2020 07:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including parafransoletite, phosphosiderite, quartz, schorl, silver, and sphalerite and more from places like Tip Top mine, Custer Co., South Dakota, United States, Bull Moose mine, Custer Co., South Dakota, United States, Herkimer, Middleville, Herkimer Co., New York, United States, Crestmore, Riverside Co., California, United States, Cobalt dist., Ontario, Canada, and Nikolaevskiy mine, Dal'negorsk, Russia.

Parafransoletite

#54558
Locality
Tip Top mine, Custer Co., South Dakota, United States 
Formula
Ca3Be2(PO4)2(PO3OH)2·4H2
Availability
Sold
Size
Capsule 
Tagged
phosphate , beryllium , pegmatite mineral  
Special Info
Type & Only Locality 

There are three small pieces each maybe 1mm and less and each piece has great abundance of tiny white rice-shaped crystals of extremely rare Parafransoletite. This was really a one-time find from the 1980's when the Tip Top was mined for beryllium and the the rare beryllium phosphates were found. The red is Montgomeryite. You can buy these and sell two.


Parafransoletite

Formula
Ca3Be2(PO4)2(PO3OH)2·4H2
Crystal System
Triclinic 
Crystal Habit
Spear Head, Wheat Sheaf, Radial 
Cleavage
None, None, None 
Luster
Vitreous - Silky 
Color
colorless, white 
Streak
white 
Class
Triclinic - Pinacoidal 
Hardness
2.5 
Special Info
Type & Only Locality

Phosphosiderite

with Strengite - #54513
Locality
Bull Moose mine, Custer Co., South Dakota, United States 
Formula
Fe3+PO4·2H2
Availability
Sold
Size
8 x 4 x 7 cm - Sm Cabinet 
Tagged
phosphate , pegmatite mineral  

Raspberry red Phosphosiderite crystals to 3mm with purple Strengite and minor Hureaulite in Barbosalite matrix.


Phosphosiderite

Formula
Fe3+PO4·2H2
Crystal System
Monoclinic 
Crystal Habit
Encrustations, Spherical 
Cleavage
Perfect, Distinct, None 
Luster
Vitreous (Glassy) 
Color
colorless, purple, pink, red, red violet 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
3.5-4 

Quartz

var. Herkimer Diamonds - #AH54534
Locality
Herkimer, Middleville, Herkimer Co., New York, United States 
Formula
SiO2 
Availability
Sold
Size
5 x 5 x 4 cm - Miniature 

Water clear Quartz, doubly terminated with graphite(?) inclusions. 


Quartz

Formula
SiO2 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Druse, Crystalline - Fine 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
brown, colorless, violet, gray, yellow 
Streak
white 
Class
Trigonal - Trapezohedral 
Fracture
Conchoidal 
Hardness
Collection
Arnold G Hampson Collection
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Schorl - 54506
Schorl - 54506

Schorl

tourmaline - #54506
Locality
Crestmore, Riverside Co., California, United States 
Formula
NaFe2+3Al6(BO3)3Si6O18(OH)4 
Availability
Sold
Size
5 x 4 x 4 cm - Miniature 
Tagged
pegmatite mineral  

Terminated 3cm Schorl crystal to 3cm on Microcline.


Schorl

Formula
NaFe2+3Al6(BO3)3Si6O18(OH)4 
Crystal System
Trigonal 
Crystal Habit
Acicular, Prismatic, Striated 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
black, brownish black, greenish black, bluish black 
Streak
brown 
Class
Trigonal - Ditrigonal Pyramidal 
Fracture
Brittle - Conchoidal 
Hardness
7.5 
Collection
Fred DeVito Collection
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Silver

#WR54521
Locality
Cobalt dist., Ontario, Canada 
Formula
Ag 
Availability
Available
Price
$375.00
Size
15 x 9 x 1.5 cm - Cabinet 
Tagged
native element , silver  

Large, excellent sheet of leaf Silver. 


Silver

Formula
Ag 
Crystal System
Isometric 
Crystal Habit
Arborescent, Dendritic, Massive 
Cleavage
None, None, None 
Luster
Metallic 
Color
silver white, gray white, gray 
Streak
silver white 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
Collection
Willard L. Roberts Collection
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Sphalerite

with Galena & Quartz - #AH54525
Locality
Nikolaevskiy mine, Dal'negorsk, Russia 
Formula
ZnS 
Availability
Sold
Size
8 x 6.5 x 4.5 cm - Sm Cabinet 
Tagged
sulfide  

Twinned, very lustrous Sphalerite crystals to 1.5cm on Quartz. It is really a nice piece.


Sphalerite

Formula
ZnS 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals, Granular, Colloform 
Cleavage
Perfect, Perfect, Perfect 
Luster
Resinous - Greasy 
Color
brown, yellow, red, green, black 
Streak
brownish white 
Class
Isometric - Hextetrahedral 
Fracture
Uneven 
Hardness
3.5-4 
Collection
Arnold G Hampson Collection

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