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2 items @ $85.00  

Rare Minerals

Monday, 20 January 2025 06:00 PM

Introducing the "Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including quartz, ranunculite, shlykovite, sorbyite, spherocobaltite, and spurrite and more from places like San Gabriel, Rio Grande do Sul, Brazil, Kobokobo Pegmatite, Sud-Kivu, Democratic Republic of Congo, Tsentral’nyi mine, Rasvumchorr Mt., Khibiny, Kola Peninsula, Russia, Candelaria dist., Mineral Co., Nevada, United States, Agoudal mines, Tansifte Caïdat, Zagora, Drâa-Tafilalet, Morocco, and Tres Hermanas dist., Luna Co., New Mexico, United States.

Quartz

ps after Anhydrite - #BAC65309
Locality
San Gabriel, Rio Grande do Sul, Brazil 
Formula
SiO2 
Availability
Available
Price
$80.00
Size
5.5 x 5 x 4 cm - Sm Cabinet 

I found no reference to this locality, perhaps you might know?

Originally labeled as Quartz ps after Laumontite, but looks more like a pseudomorph (or epimorph) after Anhydrite. The centers of the crystals are hollowed out. Any which way, it a nice example of replacement.


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
William & Anne Cook Collection
Mineralpedia
View Quartz
On Dakota Matrix
Previously Sold Quartz
On Dakota Matrix
Other Available Quartz
WebMineral
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Mindat
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Ranunculite

with Moreauite - #BAC65310
Locality
Kobokobo Pegmatite, Sud-Kivu, Democratic Republic of Congo 
Formula
Al(UO2)(PO3OH)(OH)3·4H2
Availability
Available
Price
$55.00
Size
1.3 x 1.4 x 1.7 cm - Thumbnail 
Tagged
phosphate  
Special Info
Radioactive!! 

Yellow pulverulent mass of Ranunculite.


Ranunculite

Formula
Al(UO2)(PO3OH)(OH)3·4H2
Crystal System
Monoclinic 
Crystal Habit
Nodular, Platy, Botryoidal 
Cleavage
Perfect, Perfect, None 
Color
golden yellow, canary yellow 
Streak
light yellow 
Class
Monoclinic 
Fracture
Irregular 
Hardness
Collection
William & Anne Cook Collection
Special Info
Radioactive!!

Shlykovite

with Hisingerite - #CL62548
Locality
Tsentral’nyi mine, Rasvumchorr Mt., Khibiny, Kola Peninsula, Russia 
Formula
KCa[Si4O9(OH)]·3H2
Availability
Sold
Size
5 x 3.5 x 3 cm - Miniature 

Beige or light red segregations of Shlykovite with red Hisingerite.


Shlykovite

Formula
KCa[Si4O9(OH)]·3H2
Crystal System
Monoclinic 
Color
grayish white, beige 
Class
Monoclinic - Prismatic 
Hardness

Sorbyite

#BAC65356
Locality
Candelaria dist., Mineral Co., Nevada, United States 
Formula
Pb9Cu(Sb,As)11S26 
Availability
Sold
Size
3.6 x 1 x 1 cm - Miniature 
Tagged
sulfide , copper  

Dark grey metallic masses throughout matrix with some native Silver. Rare worldwide.


Sorbyite

Formula
Pb9Cu(Sb,As)11S26 
Crystal System
Monoclinic 
Crystal Habit
Tabular, Striated 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
lead gray, black 
Streak
metallic 
Class
Monoclinic - Prismatic 
Hardness
3.5-4 
Collection
William & Anne Cook Collection
Mineralpedia
View Sorbyite
On Dakota Matrix
Previously Sold Sorbyite
On Dakota Matrix
Other Available Sorbyite
WebMineral
View Sorbyite
Mindat
View Sorbyite

Spherocobaltite

#BAC65351
Locality
Agoudal mines, Tansifte Caïdat, Zagora, Drâa-Tafilalet, Morocco 
Formula
CoCO3 
Availability
Sold
Size
2 x 0.8 x 1 cm - Thumbnail 
Tagged
carbonate  

Very nice deep red crystals.


Spherocobaltite

Collection
William & Anne Cook Collection

Spurrite

#BAC65343
Locality
Tres Hermanas dist., Luna Co., New Mexico, United States 
Formula
Ca5(SiO4)2(CO3
Availability
Sold
Size
5 x 3 x 3 cm - Miniature 

Purple sugary mass.


Spurrite

Formula
Ca5(SiO4)2(CO3
Crystal System
Monoclinic 
Crystal Habit
Granular, Cleaveable, Massive - Granular 
Cleavage
Distinct, None, None 
Luster
Vitreous (Glassy) 
Color
gray, gray white, lilac gray 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
Collection
William & Anne Cook Collection
Mineralpedia
View Spurrite
On Dakota Matrix
Previously Sold Spurrite
On Dakota Matrix
Other Available Spurrite
WebMineral
View Spurrite
Mindat
View Spurrite

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