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Rare Mineral Species

Thursday, 09 January 2025 06:00 PM

Introducing the "Rare Mineral Species" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including heidornite, kamiokite, lorandite, manjiroite, mawbyite, and melanotekite and more from places like Niedersachswerfen, Harztor, Thuringia, Germany, Briketno-Zheltukhinskoe deposit, Ryazan Oblast, Russia, Allchar, Roszdan, Macedonia, Smartt Mine, Kalahari Mn field, Northern Cape Province, South Africa, Roter Berg, Schneeberg dist., Erzgebirge, Saxony, Germany, and near Hillsboro, Hillsboro, Sierra Co., New Mexico.

SOLD

Heidornite

#BAC65142

Details
Data
Provenance
Resources

Locality: Niedersachswerfen, Harztor, Thuringia, Germany
Formula: Na₂Ca₃B₅O₈(SO₄)₂(OH)₂Cl
Availability: Sold
Size: 0.5 x 0.10 x 0.100 cm - Thumbnail

A 5mm terminated crystal with parallel straitions across the prism faces. Incredibly rare.

Heidornite

Formula: Na₂Ca₃B₅O₈(SO₄)₂(OH)₂Cl
Crystal System: Monoclinic
Cleavage: Perfect, None, None
Luster: Vitreous (Glassy)
Color: colorless
Streak: white
Class: Monoclinic - Prismatic
Hardness: 4-5

Collection: William & Anne Cook Collection

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

SOLD

Kamiokite

#BAC65281

Details
Data
Provenance
Resources

Locality: Briketno-Zheltukhinskoe deposit, Ryazan Oblast, Russia
Formula: Fe²⁺₂Mo⁴⁺₃O₈
Availability: Sold
Size: 2 x 2 x 1 cm - Thumbnail

Black crystals to 1mm with purple Fluorite.

Kamiokite

Formula: Fe²⁺₂Mo⁴⁺₃O₈
Crystal System: Hexagonal
Crystal Habit: Tabular, Hexagonal
Cleavage: Perfect, None, None
Luster: Sub Metallic
Color: iron black
Streak: black
Class: Hexagonal - Dihexagonal Pyramidal
Fracture: Even
Hardness: 4.5

Collection: William & Anne Cook Collection

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

SOLD

Lorandite

with Raguinite & Realgar - #65111

Details
Data
Provenance
Resources

Locality: Allchar, Roszdan, Macedonia
Formula: TlAsS₂
Availability: Sold
Size: 5 x 4 x 3.5 cm - Miniature

Incredible dark red Lorandite crystals to 3mm in pockets of Realgar with striated red Raguinite and red Realgar. Excellent specimen.

Lorandite

Formula: TlAsS₂
Crystal System: Monoclinic
Crystal Habit: Tabular, Prismatic
Cleavage: Perfect, Distinct, None
Luster: Sub Metallic
Color: red, carmine red, blackish lead gray
Streak: red
Class: Monoclinic - Prismatic
Fracture: Flexible
Hardness: 2-2.5

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

SOLD

Manjiroite

#BAC65277

Details
Data
Provenance
Resources

Locality: Smartt Mine, Kalahari Mn field, Northern Cape Province, South Africa
Formula: Na(Mn⁴⁺,Mn²⁺)₈O₁₆·nH₂O
Availability: Sold
Size: 2.5 x 2.3 x 1.9 cm - Thumbnail