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Ore Minerals

Wednesday, 29 June 2022 08:00 AM

Introducing the "Ore Minerals" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including topaz, tourmaline, uraninite, and zincite and more from places like Lord Hill pegmatite, Stoneham, Oxford Co., Maine, United States, Blue Bird mine, Colorado dist., Jefferson Co., Montana, United States, Big Buck mine, San Juan Co., Utah, United States, and Franklin, Sussex Co., New Jersey, United States.

SOLD

Topaz

#49106

Details
Data
Provenance
Resources

Locality: Lord Hill pegmatite, Stoneham, Oxford Co., Maine, United States
Formula: Al₂SiO₄F₂
Availability: Sold
Size: 17 x 13 x 8 cm - Cabinet

I can't say much about the photos, but the specimen is magnificent. It is a huge blue Topaz crystal from the Chris van Laer collection. It's hardly gemmy, but internally fractured. The cyrstal has four faces with a typical pryamidal face of Topaz. I am not sure if Chris collected this specimen, but his label clearly states it is from the Lord Hill pegmatite.

Topaz

Formula: Al₂SiO₄F₂
Crystal System: Orthorhombic
Crystal Habit: Crystalline - Coarse, Prismatic, Massive - Granular
Cleavage: Perfect, None, None
Luster: Vitreous (Glassy)
Color: colorless, pale blue, yellow, yellowish brown, red
Streak: white
Class: Orthorhombic - Dipyramidal
Fracture: Brittle - Uneven
Hardness: 8

Collection: Chris van Laer Collection

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

SOLD

Tourmaline

in Andesite breccia silver - gold ore - #49109

Details
Data
Provenance
Resources

Locality: Blue Bird mine, Colorado dist., Jefferson Co., Montana, United States
Formula: A(D₃)G₆(T₆O₁₈)(BO₃)₃X₃Z
Availability: Sold
Size: 16 x 13 x 9 cm - Cabinet
Tagged: ore specimen

This is a large, heavy specimen of brecciated andesite flooded with black tourmaline during the mineralization. It is sawed and polishd on one side. It is fascinating to look at all the different angular clasts which range in size from 2 to 60mm. Sulfides can be seen replacing some of the clasts and as fine disseminations and thin 1mm or less veinlets.

The Blue Bird was mined for Silver, but also produced gold, copper, lead, zinc and antimony from 1887 to 1957.

Tourmaline

Formula: Ca,Na,K[(Al,Fe²⁺,Fe³⁺,Li,Mg²⁺,Mn²⁺)₃](Al,Cr³⁺,Fe³⁺,V³⁺)₆(Si₆O₁₈)(BO₃)₃(O,OH)₃(F,O,OH)
Crystal System: Trigonal
Fracture: Irregular/Uneven-Conchoidal
Hardness: 7

Collection: Chris van Laer Collection

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

SOLD

Uraninite

- uranium ore - #AH58552

Details
Data
Provenance
Resources

Locality: Big Buck mine, San Juan Co., Utah, United States
Formula: UO₂
Availability: Sold
Size: 4.5 x 3.5 x 3 cm - Miniature
Tagged: ore specimen
Special Info: Radioactive!!

Nearly a solid mass of Uraninite.

Uraninite

Formula: UO₂
Crystal System: Isometric
Crystal Habit: Crystalline - Coarse, Botryoidal, Dendritic
Cleavage: Good, None, None
Luster: Sub Metallic
Color: brownish black, gray, grayish black, black
Streak: brownish black
Class: Isometric - Hexoctahedral
Fracture: Brittle - Conchoidal
Hardness: 5-6

Collection: Arnold G Hampson Collection
Special Info: Radioactive!!

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

SOLD

Zincite

- zinc ore - #AH58554

Details
Data
Provenance
Resources

Locality: Franklin, Sussex Co., New Jersey, United States
Formula: ZnO
Availability: Sold
Size: 7.5 x 5.5 x 2.5 cm - Sm Cabinet
Tagged: ore specimen
Special Info: Type Locality

Deep red, large crystalline Zincite. Zincite is the least abundant of the three zinc ores at Franklin, but is also the richest in zinc and contains 80% zinc as compared with about 19 % Zn in franklinite and 58 % Zn in willemite.

Zincite

Formula: ZnO
Crystal System: Hexagonal
Crystal Habit: Massive - Fibrous, Granular, Disseminated
Cleavage: Perfect, None, None
Luster: Sub Metallic
Color: yellow, dark yellow, dark red, orange
Streak: yellowish orange
Class: Hexagonal - Dihexagonal Pyramidal
Fracture: Sub Conchoidal
Hardness: 4-5

Collection: Arnold G Hampson Collection
Special Info: Type Locality

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

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