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Mexican Minerals

Tuesday, 24 March 2020 12:00 PM

Introducing the "Mexican Minerals" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including gypsum, hemimorphite, mimetite, polybasite and more from places like Naica, Mun. de Saucillo, Chihuahua, Mexico, Mina Ojuela, Mapimi, Durango, Mexico, San Roberto mine, San Luis Potosi, Mexico, Veta Grande mine, Vetagrande, Zacatecas, Mexico, and San Juan de Rayas mine, Guanajuato, Mexico.

SOLD

Gypsum - AH52771

Gypsum - AH52771

Gypsum

var. selenite with Quartz - #AH52771

Details
Data
Provenance
Resources

Locality: Naica, Mun. de Saucillo, Chihuahua, Mexico
Formula: CaSO₄·2H₂O
Availability: Sold
Size: 15 x 8 x 6 cm - Cabinet

Large excellent crystal with a fine coating of iron oxide. Without this coating, the specimen would be waterclear. I don't know if it is possible to remove the coating, however, without damage to the crystal. There are overgrowths of Quartz clusters resembling pineapples. The third from the last photo shows an imprint from one of these clusters. A near perfect specimen which shows virtually no damage. It is nearly perfect.

Gypsum

Formula: CaSO₄·2H₂O
Crystal System: Monoclinic
Crystal Habit: Tabular, Crystalline - Coarse, Massive - Fibrous
Cleavage: Perfect, Distinct, Distinct
Luster: Pearly
Color: white, colorless, yellowish white, greenish white, brown
Streak: white
Class: Monoclinic - Prismatic
Fracture: Fibrous
Hardness: 2

Collection: Arnold G Hampson Collection

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

SOLD

Hemimorphite - AH52745

Hemimorphite - AH52745

Hemimorphite

#AH52745

Details
Data
Provenance
Resources

Locality: Mina Ojuela, Mapimi, Durango, Mexico
Formula: Zn₄Si₂O₇(OH)₂·H₂O
Availability: Sold
Size: 7 x 4.5 x 3 cm - Sm Cabinet

Thick bladed Hemimorphite crystals to over 1cm. Acquired in 1970 by Arnold Hampson.

Hemimorphite

Formula: Zn₄Si₂O₇(OH)₂·H₂O
Crystal System: Orthorhombic
Crystal Habit: Massive, Stalactitic, Mammillary
Cleavage: Perfect, None, None
Luster: Vitreous (Glassy)
Color: brown, colorless, greenish gray, yellow brown, white
Streak: white
Class: Orthorhombic - Pyramidal
Fracture: Conchoidal
Hardness: 5

Collection: Arnold G Hampson Collection

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

SOLD

Mimetite - AH52751

Mimetite - AH52751

Mimetite

#AH52751

Details
Data
Provenance
Resources

Locality: San Roberto mine, San Luis Potosi, Mexico
Formula: Pb₅(AsO₄)₃Cl
Availability: Sold
Size: 8 x 5 x 4 cm - Sm Cabinet
Tagged: arsenate

Orange crystal balls of Mimetite to 5mm across. Awesome specimen. Acquired by Arnold Hampson in 1966.

Mimetite

Formula: Pb₅(AsO₄)₃Cl
Crystal System: Hexagonal
Crystal Habit: Reniform, Globular, Prismatic
Cleavage: Imperfect, None, None
Luster: Adamantine - Resinous
Color: white, yellow, orange, brown, red
Streak: white
Class: Hexagonal - Dipyramidal
Fracture: Brittle - Conchoidal
Hardness: 3.5-4

Collection: Arnold G Hampson Collection

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

SOLD

Mimetite - AH52753

Mimetite - AH52753

Mimetite

with Calcite - #AH52753

Details
Data
Provenance
Resources

Locality: Mina Ojuela, Mapimi, Durango, Mexico
Formula: Pb₅(AsO₄)₃Cl
Availability: Sold
Size: 5.5 x 3.5 x 4 cm - Sm Cabinet
Tagged: arsenate

Yellow acicular crystals to 4mm with Calcite.

Mimetite

Formula: Pb₅(AsO₄)₃Cl
Crystal System: Hexagonal
Crystal Habit: Reniform, Globular, Prismatic
Cleavage: Imperfect, None, None
Luster: Adamantine - Resinous
Color: white, yellow, orange, brown, red
Streak: white
Class: Hexagonal - Dipyramidal
Fracture: Brittle - Conchoidal
Hardness: 3.5-4

Collection: Arnold G Hampson Collection

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

SOLD

Polybasite - BN51684

Polybasite - BN51684

Polybasite

with Acanthite on Quartz - #BN51684

Details
Data
Provenance
Resources

Locality: Veta Grande mine, Vetagrande, Zacatecas, Mexico
Formula: Cu(Ag,Cu)₆Ag₉Sb₂S₁₁
Availability: Sold
Size: 6 x 5 x 3.5 cm - Sm Cabinet
Tagged: sulfide , copper , silver

Hexagonal, silvery, Polybasite crystals to 6mm with associated Acanthite crystals. Some minor Chalcopyrite.

Polybasite

Formula: Cu(Ag,Cu)₆Ag₉Sb₂S₁₁
Crystal System: Monoclinic
Crystal Habit: Massive - Granular, Granular, Pseudo Hexagonal
Cleavage: Poor, None, None
Luster: Sub Metallic
Color: black, dark ruby red
Streak: reddish black
Class: Monoclinic - Prismatic
Fracture: Uneven
Hardness: 2.5-3

Collection: Dr. Buford Nichols Collection

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

SOLD

Polybasite - BN51688

Polybasite - BN51688

Polybasite

#BN51688

Details
Data
Provenance
Resources

Locality: San Juan de Rayas mine, Guanajuato, Mexico
Formula: Cu(Ag,Cu)₆Ag₉Sb₂S₁₁
Availability: Sold
Size: 1.4 x 1.4 x 0.7 cm - Thumbnail
Tagged: sulfide , copper , silver

Small plates of striated Polybasite showing nice striations.

Polybasite

Formula: Cu(Ag,Cu)₆Ag₉Sb₂S₁₁
Crystal System: Monoclinic
Crystal Habit: Massive - Granular, Granular, Pseudo Hexagonal
Cleavage: Poor, None, None
Luster: Sub Metallic
Color: black, dark ruby red
Streak: reddish black
Class: Monoclinic - Prismatic
Fracture: Uneven
Hardness: 2.5-3

Collection: Dr. Buford Nichols Collection

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

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