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Rare Minerals for the Collector

Sunday, 15 December 2024 06:00 PM

Introducing the "Rare Minerals for the Collector" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including albite, feruvite, lorenzenite, and macdonaldite and more from places like Swanson mine, Middlesex Co., Connecticut, United States, Anjanabonoina peg., Betafo dist., Vakinankaratra, Madagascar, Diamond Jo quarry, Magnet Cove, Hot Spring Co., Arkansas, United States, and Baumann prospect, Tulare Co., California, United States.

Albite

with Quartz - #DL64370
Locality
Swanson mine, Middlesex Co., Connecticut, United States 
Formula
NaAlSi3O8 
Availability
Available
Price
$45.00
Size
7.5 x 6 x 5 cm - Sm Cabinet 
Tagged
pegmatite mineral  

Cut section of pegmatite rock showing the swirling nature of yellow Albite, variety cleavelandite. Also present is smoky Quartz and Muscovite .


Albite

Formula
NaAlSi3O8 
Crystal System
Triclinic 
Crystal Habit
Blocky, Striated, Granular 
Cleavage
Perfect, Good, None 
Luster
Vitreous (Glassy) 
Color
white, gray, greenish gray, bluish green, gray 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Uneven 
Hardness
Collection
Dr. David London Collection
Mineralpedia
View Albite
On Dakota Matrix
Previously Sold Albite
On Dakota Matrix
Other Available Albite
WebMineral
View Albite
Mindat
View Albite

Feruvite

#BAC64056
Locality
Anjanabonoina peg., Betafo dist., Vakinankaratra, Madagascar 
Formula
CaFe2+3(Al5Mg)(BO3)3Si6O18(OH)3
Availability
Available
Price
$65.00
Size
1.8 x 1.6 x 1 cm - Thumbnail 

Dark green to black crystal set nicely terminated.


Feruvite

Formula
CaFe2+3(Al5Mg)(BO3)3Si6O18(OH)3
Crystal System
Trigonal 
Crystal Habit
Prismatic, Striated 
Cleavage
None, None, None 
Luster
Vitreous - Dull 
Color
brownish black, dark brown, black 
Streak
gray 
Class
Trigonal - Ditrigonal Pyramidal 
Hardness
Collection
William & Anne Cook Collection
On Dakota Matrix
Previously Sold Feruvite
On Dakota Matrix
Other Available Feruvite
WebMineral
View Feruvite
Mindat
View Feruvite

Lorenzenite

#DO65084
Locality
Diamond Jo quarry, Magnet Cove, Hot Spring Co., Arkansas, United States 
Formula
Na2Ti2O3(Si2O6
Availability
Sold
Size
3.2 x 2 x 1.5 cm - Miniature 

Burgundy colored prismatic crystal tl to 1mm.


Lorenzenite

Formula
Na2Ti2O3(Si2O6
Crystal System
Orthorhombic 
Crystal Habit
Acicular, Granular, Massive - Fibrous 
Cleavage
Distinct, Distinct, None 
Luster
Vitreous - Greasy 
Color
brown, colorless, green, white, light blue 
Streak
light brownish yellow 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Don Owens Collection

Macdonaldite

#REW65085
Locality
Baumann prospect, Tulare Co., California, United States 
Formula
BaCa4Si16O36(OH)2·10H2
Availability
Available
Price
$25.00
Size
5 x 4 x 2.5 cm - Miniature 

Radiating white crystal groups.


Macdonaldite

Formula
BaCa4Si16O36(OH)2·10H2
Crystal System
Orthorhombic 
Crystal Habit
Acicular 
Cleavage
Perfect, Good, Indistinct 
Luster
Vitreous - Silky 
Color
colorless, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Hardness
3.5-4 
Collection
Robert E. Walstrom collection

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