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Rare Minerals for Sale

Saturday, 23 November 2019 04:00 PM

Introducing the "Rare Minerals for Sale" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including mesolite, mixite, molybdenite, monazite, olmsteadite, and pyrite and more from places like Grand Marias, Cook Co., Minnesota, United States, Gold Hill mine, Tooele Co., Utah, United States, Mountain City dist., Elko Co., Nevada, United States, Trolvis Quarry, Longdowns, Stithians, Cornwall, England, White Cap mine, Pennington Co., South Dakota, United States, and Lower Mesabi Range, Itasca Co., Minnesota, United States.

SOLD

Mesolite

#AH51810

Details
Data
Provenance
Resources

Locality: Grand Marias, Cook Co., Minnesota, United States
Formula: Na₂Ca₂(Si₉Al₆)O₃₀·8H₂O
Availability: Sold
Size: 10 x 6 x 3.5 cm - Cabinet

A section of a larger group of pink, compact Mesolite crystals. Collected by Hampson in 1945. Read Hampson's bio here.

Mesolite

Formula: Na₂Ca₂(Si₉Al₆)O₃₀·8H₂O
Crystal System: Monoclinic
Crystal Habit: Acicular, Capillary, Spherical
Cleavage: Perfect, Perfect, None
Luster: Vitreous - Silky
Color: white, gray, pale yellow
Streak: white
Class: Monoclinic - Sphenoidal
Fracture: Uneven
Hardness: 5

Collection: Arnold G Hampson Collection

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

SOLD

Mixite

with Conichalcite - #AH51843

Details
Data
Provenance
Resources

Locality: Gold Hill mine, Tooele Co., Utah, United States
Formula: Cu²⁺₆Bi(AsO₄)₃(OH)₆·3H₂O
Availability: Sold
Size: 4.5 x 3 x 2 cm - Miniature
Tagged: arsenate , copper

Miniature specimen with face covered in aqua blue acicular sprays of Mixite with beady green Conichalcite.

Mixite

Formula: Cu²⁺₆Bi(AsO₄)₃(OH)₆·3H₂O
Crystal System: Hexagonal
Crystal Habit: Acicular, Radial, Encrustations
Luster: Adamantine
Color: blue green, yellow green, white, light blue, light green
Streak: pale green
Class: Hexagonal - Dipyramidal
Fracture: Uneven
Hardness: 3.5-4

Collection: Arnold G Hampson Collection

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

Molybdenite

#AH51818

$40.00 - Available
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Details
Data
Provenance
Resources

Locality: Mountain City dist., Elko Co., Nevada, United States
Formula: MoS₂
Availability: Available
Price: $40.00
Size: 5.5 x 5 x 5 cm - Sm Cabinet
Tagged: sulfide

Silvery foliated crystals of Molybdenite to 8mm in matrix.

Molybdenite

Formula: MoS₂
Crystal System: Hexagonal
Crystal Habit: Foliated, Massive, Disseminated
Cleavage: Perfect, None, None
Luster: Metallic
Color: black, lead gray, gray
Streak: greenish gray
Class: Hexagonal - Dihexagonal Dipyramidal
Fracture: Sectile
Hardness: 1

Collection: Arnold G Hampson Collection

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

SOLD

Monazite

on tourmaline - #50265

Details
Data
Provenance
Resources

Locality: Trolvis Quarry, Longdowns, Stithians, Cornwall, England
Formula: (Ce,Sm)PO₄
Availability: Sold
Size: 2 x 1.5 x 1 cm - Thumbnail
Tagged: phosphate

Thiny tan rosettes of Monazite less than 0.5mm.

Monazite

Mineralpedia: View Monazite-(La)
On Dakota Matrix: Previously Sold Monazite
On Dakota Matrix: Other Available Monazite
WebMineral: View Monazite
Mindat: View Monazite

SOLD

Olmsteadite

#51793

Details
Data
Provenance
Resources

Locality: White Cap mine, Pennington Co., South Dakota, United States
Formula: KFe²⁺₂NbO₂(PO₄)₂·2H₂O
Availability: Sold
Size: 1.5 x 1.2 x 1.2 cm - Thumbnail
Tagged: phosphate , pegmatite mineral
Special Info: Type Locality

Siderite and smoky Quartz matrix with one little area of around 1mm with a root-beer colored Olmsteadite crystal. The crystal shows faces and is striated. The color is unusual and distiguished from tiny orange crystals elsewhre in the matrix, which are secondary Sphalerite crystals.

Olmsteadite

Formula: KFe²⁺₂NbO₂(PO₄)₂·2H₂O
Crystal System: Orthorhombic
Crystal Habit: Prismatic
Cleavage: Good, Good, None
Luster: Subadamantine
Color: brown, reddish brown, black
Streak: olive green
Class: Orthorhombic - Pyramidal
Fracture: Brittle
Hardness: 4

Special Info: Type Locality

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

SOLD

Pyrite

#AH51829

Details
Data
Provenance
Resources

Locality: Lower Mesabi Range, Itasca Co., Minnesota, United States
Formula: FeS₂
Availability: Sold
Size: 6 x 5 x 2.5 cm - Sm Cabinet
Tagged: sulfide

Rounded clusters composed of cubic Pyrite crystals. The clusters are 1 to 1.5cm in diameter. The lower Mesabi Range is one of four major Precambrian age mountain ranges in upper Minnesota. The others are the Cuyuna, Vermilion, and the Gunflint. The later being mostly in Ontario. Collectively they are known as the Iron Range and considered the chief producing iron mining district of the United States. This information is taken from Wikipedia and more can be here.

The specimen was collected by Hampson in 1962. Read Hampson bio.

Pyrite

Formula: FeS₂
Crystal System: Isometric
Crystal Habit: Striated, Druse, Stalactitic
Cleavage: Poor, Poor, None
Luster: Metallic
Color: pale brass yellow
Streak: greenish black
Class: Isometric - Diploidal
Fracture: Conchoidal
Hardness: 6.5

Collection: Arnold G Hampson Collection

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

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