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Rare Minerals

Saturday, 31 May 2025 06:00 PM

Introducing the "Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including nevadaite, penfieldite, plášilite, riebeckite, rosieresite, and stannite and more from places like Gold Quarry mine, Eureka Co., Nevada, United States, Sierra Gorda dist., Antofagasta, Chile, Blue Lizard mine, Red Canyon, San Juan Co., Utah, United States, Washington Pass, Okanogan Co., Washington, United States, Le Cantonnier vein, Nontron, Dordogne, France, and Yaogangxian mine, Chenzhou, Hunan prov., China.

SOLD

Nevadaite - 65502

Nevadaite - 65502

Nevadaite

with Hewettite - #65502

Details
Data
Provenance
Resources

Locality: Gold Quarry mine, Eureka Co., Nevada, United States
Formula: (Cu²⁺,□,Al,V³⁺)₆[Al₈(PO₄)₈F₈](OH)₂·22H₂O
Availability: Sold
Size: 4 x 2 x 2 cm - Miniature
Tagged: phosphate , copper
Special Info: Type Locality

About four little clusters of blue Nevadaite with arange-brown fibrous Hewettite.

Nevadaite

Formula: (Cu²⁺,[ ],Al,V³⁺)₆[Al₈(PO₄)₈F₈](OH)₂·22H₂O
Crystal System: Orthorhombic
Crystal Habit: Radial, Crystalline - Fine, Acicular
Cleavage: None, None, None
Luster: Vitreous (Glassy)
Color: pale green, turquoise
Streak: pale powder blue
Class: Orthorhombic - Disphenoidal
Fracture: Conchoidal
Hardness: 3

Special Info: Type Locality

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

SOLD

Penfieldite - 65514

Penfieldite - 65514

Penfieldite

with Pseudoboleite - #65514

Details
Data
Provenance
Resources

Locality: Sierra Gorda dist., Antofagasta, Chile
Formula: Pb₂Cl₃(OH)
Availability: Sold
Size: 5.5 x 4.5 x 3.5 cm - Sm Cabinet

Great specimen with tiny 1mm crystals in a large 1.5x1cm vug along with blue Pseudoboleite. I once had many of these a while back. They are scarse these days.

Penfieldite

Formula: Pb₂Cl₃(OH)
Crystal System: Hexagonal
Crystal Habit: Pyramidal, Tabular
Cleavage: Distinct, None, None
Luster: Adamantine - Greasy
Color: colorless, white, yellowish, bluish
Streak: white
Class: Hexagonal - Dihexagonal Dipyramidal
Hardness: 3-4

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

SOLD

Plášilite - 65928

Plášilite - 65928

Plášilite

#65928

Details
Provenance
Resources

Locality: Blue Lizard mine, Red Canyon, San Juan Co., Utah, United States
Formula: Na(UO₂)(SO₄)(OH) · 2H₂O
Availability: Sold
Size: Chip < 1cm

Pale yellow round groups of acicular Plášilite less than 0.5mm.

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

SOLD

Riebeckite - 65953

Riebeckite - 65953

Riebeckite

on Microcline - #65953

Details
Data
Provenance
Resources

Locality: Washington Pass, Okanogan Co., Washington, United States
Formula: □Na₂(Fe²⁺₃Fe³⁺₂)Si₈O₂₂(OH)₂
Availability: Sold
Size: 1 x 1.5 x 1.2 cm - Thumbnail

Nice thumbnail specimen with very good black, striated crystals to 1cm on Microcline.

Riebeckite

Formula: [box]Na₂(Fe²⁺₃Fe³⁺₂)Si₈O₂₂(OH)₂
Crystal System: Monoclinic
Crystal Habit: Striated, Fibrous, Massive - Fibrous
Cleavage: Perfect, Perfect, None
Luster: Vitreous - Silky
Color: blue, black, dark green
Streak: greenish brown
Class: Monoclinic - Prismatic
Fracture: Brittle - Uneven
Hardness: 4

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

SOLD

Rosieresite - 65840

Rosieresite - 65840

Rosieresite

with Pyromorphite - #65840

Details
Data
Provenance
Resources

Locality: Le Cantonnier vein, Nontron, Dordogne, France
Formula: (Pb, Cu, Al, P, O, H)
Availability: Sold
Size: Chip < 1cm
Tagged: copper

Whiteish or creamy colored Rosieresite with green Pyromorphite. Rosieresite is a questionable species.

Rosieresite

Formula: (Pb,Cu,Al)(PO4)x�n(H2O)
Crystal System: No Crystals
Crystal Habit: Stalactitic
Cleavage: None, None, None
Luster: Vitreous - Pearly
Color: yellow, yellow, pale brown
Streak: white
Class: Amorphous - No Crystals
Fracture: Brittle - Conchoidal
Hardness: 3-3.5

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

Stannite - 65533

Stannite - 65533

Stannite

#65533

$225.00 - Available
Details
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Details
Data
Provenance
Resources

Locality: Yaogangxian mine, Chenzhou, Hunan prov., China
Formula: Cu₂FeSnS₄
Availability: Available
Price: $225.00
Size: 3.5 x 2.5 x 2.5 cm - Miniature
Tagged: copper , tin

Brassy, striated crystals of Stannite from 5 to 10mm. Very good specimen.

Stannite

Formula: Cu₂FeSnS₄
Crystal System: Tetragonal
Crystal Habit: Massive - Granular, Crystalline - Fine
Cleavage: Imperfect, None, None
Luster: Metallic
Color: blue, grayish black, steel gray
Streak: black
Class: Tetragonal - Scalenohedral
Fracture: Uneven
Hardness: 3.5-4

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

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