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Rare Minerals Specimens

Tuesday, 24 January 2023 04:00 PM

Introducing the "Rare Minerals Specimens" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including petalite, pyrargyrite, rouaite, saneroite, santarosaite, and theresemagnanite and more from places like Tanco pegmatite, Bernic Lake, Manitoba, Canada, Montezuma, Summit Co., Colorado, United States, Coquimbo, Chile, Fianel mine, Ausserferrera, Ferrera, Viamala, Grisons, Switzerland, Santa Rosa mine, Iquique, Tarapacá Region, Chile, and Cap Garonne Mine, Le Pradet, Var, Provence-Alpes-Côte d'Azur, France.

SOLD

Petalite

#DL60768

Details
Data
Provenance
Resources

Locality: Tanco pegmatite, Bernic Lake, Manitoba, Canada
Formula: LiAlSi₄O₁₀
Availability: Sold
Size: 15 x 9 x 2.5 cm - Cabinet
Tagged: pegmatite mineral , lithium

Large chunk of Petalite with an interesting pearly luster. Petalite has a basal cleavage and is seen on this specimen as a somewhat undulating suface and not as good flat plane. It is less dense than Quartz and Pollucite and feels light in-hand. The specimen is from the Dr. David H. London collection. I obtained the bulk of his research pegmatite collection and many of the specimens are illustrated in his "Pegmatites" book. Most of the specimens will be show cased on a Special Edition later this year.

Petalite

Formula: LiAlSi₄O₁₀
Crystal System: Monoclinic
Crystal Habit: Massive
Cleavage: Perfect, Imperfect, None
Luster: Vitreous - Pearly
Color: colorless, gray, yellow, yellow gray, white
Streak: colorless
Class: Monoclinic - Prismatic
Fracture: Brittle - Conchoidal
Hardness: 6-6.5

Collection: Dr. David London Collection

Mineralpedia: View Petalite
On Dakota Matrix: Previously Sold Petalite
On Dakota Matrix: Other Available Petalite
WebMineral: View Petalite
Mindat: View Petalite

SOLD

Pyrargyrite

with Acanthite - #RS60902

Details
Data
Provenance
Resources

Locality: Montezuma, Summit Co., Colorado, United States
Formula: Ag₃SbS₃
Availability: Sold
Size: 5 x 5 x 4 cm - Miniature
Tagged: sulfide , silver

Dull massive Acanthite with massive Pyrargyrite and wire Silver.

Pyrargyrite

Formula: Ag₃SbS₃
Crystal System: Trigonal
Crystal Habit: Massive, Crystalline - Poor, Prismatic
Cleavage: Poor, None, None
Luster: Sub Metallic
Color: deep red, red gray
Streak: cherry red
Class: Trigonal - Ditrigonal Pyramidal
Fracture: Brittle - Conchoidal
Hardness: 2.5

Collection: RC Stamberg Collection

Mineralpedia: View Pyrargyrite
On Dakota Matrix: Previously Sold Pyrargyrite
On Dakota Matrix: Other Available Pyrargyrite
WebMineral: View Pyrargyrite
Mindat: View Pyrargyrite

SOLD

Rouaite

with Cuprite on Copper - #BAC60760

Details
Data
Provenance
Resources

Locality: Coquimbo, Chile
Formula: Cu₂NO₃(OH)₃
Availability: Sold
Size: 3 x 3 x 1 cm - Thumbnail
Tagged: copper

Dull earthy green Rouaite on Copper with Cuprite. There is a bit of good information on the Gunnar Farber label with the specimen. Gunnar states that this specimen is from an old museum, although he does not state what museum.

Rouaite

Formula: Cu₂NO₃(OH)₃
Crystal System: Monoclinic
Crystal Habit: Euhedral Crystals, Aggregates, Equant Grains
Cleavage: Perfect, None, None
Luster: Vitreous (Glassy)
Color: dark emerald green
Streak: green
Class: Monoclinic - Sphenoidal
Fracture: Splintery
Hardness: -

Collection: William & Anne Cook Collection

Mineralpedia: View Rouaite
On Dakota Matrix: Previously Sold Rouaite
On Dakota Matrix: Other Available Rouaite
WebMineral: View Rouaite
Mindat: View Rouaite

Saneroite

#BAC60767

$50.00 - Available
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Details
Data
Provenance
Resources

Locality: Fianel mine, Ausserferrera, Ferrera, Viamala, Grisons, Switzerland
Formula: Na₂(Mn²⁺,Mn³⁺)₁₀V⁵⁺Si₁₁O₃₄(OH)₄
Availability: Available
Price: $50.00
Size: 1.5 x 2.5 x 3 cm - Thumbnail
Tagged: vanadium

Fiery orange red crystal grains to 2mm in a mass 2.2 x 1cm.

Saneroite

Formula: Na₂(Mn²⁺,Mn³⁺)₁₀V⁵⁺Si₁₁O₃₄(OH)₄
Crystal System: Triclinic
Crystal Habit: Tabular, Aggregates
Cleavage: Perfect, Perfect, None
Luster: Resinous - Greasy
Color: light orange
Streak: white
Class: Triclinic - Pinacoidal
Hardness: 6-7

Collection: William & Anne Cook Collection

Mineralpedia: View Saneroite
On Dakota Matrix: Previously Sold Saneroite
On Dakota Matrix: Other Available Saneroite
WebMineral: View Saneroite
Mindat: View Saneroite

SOLD

Santarosaite

#BAC60764

Details
Data
Provenance
Resources

Locality: Santa Rosa mine, Iquique, Tarapacá Region, Chile
Formula: CuB₂O₄
Availability: Sold
Size: 2.3 x 2 x 2 cm - Thumbnail
Tagged: copper
Special Info: Type Locality

Beady blue crystals across face. Very rich specimen.

Santarosaite

Formula: CuB₂O₄
Crystal System: Tetragonal
Crystal Habit: Globular
Color: vivid blue
Streak: pale blue
Class: Tetragonal - Scalenohedral
Hardness: -

Collection: William & Anne Cook Collection
Special Info: Type Locality

Mineralpedia: View Santarosaite
On Dakota Matrix: Previously Sold Santarosaite
On Dakota Matrix: Other Available Santarosaite
WebMineral: View Santarosaite
Mindat: View Santarosaite

SOLD

Theresemagnanite

#BAC60765

Details
Data
Provenance
Resources

Locality: Cap Garonne Mine, Le Pradet, Var, Provence-Alpes-Côte d'Azur, France
Formula: Co₆SO₄(OH)₁₀·8H₂O
Availability: Sold
Size: 1 x 0.6 x 0.8 cm - Thumbnail
Special Info: Type Locality

Well, there's no real good crystals on this specimen, only purplish scales and coatings. Maybe I need a new microscope!

Theresemagnanite

Formula: Co₆SO₄(OH)₁₀·8H₂O
Crystal System: Hexagonal
Crystal Habit: Thin, Platy, Spherical
Cleavage: Perfect, None, None
Luster: Pearly
Color: pink, light pink
Streak: white
Class: Hexagonal - Pyramidal
Fracture: Irregular
Hardness: 1.5-2

Collection: William & Anne Cook Collection
Special Info: Type Locality

On Dakota Matrix: Previously Sold Theresemagnanite
On Dakota Matrix: Other Available Theresemagnanite
WebMineral: View Theresemagnanite
Mindat: View Theresemagnanite

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