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Rare & Systematic Minerals

Sunday, 30 April 2023 06:00 PM

Introducing the "Rare & Systematic Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including perhamite, proustite, rosenhahnite, scorzalite, tarbuttite, and tellurantimony and more from places like Cobble Hill, West Paris, Oxford Co., Maine, United States, Uchucchacua mine, Oyon prov., Lima dept., Peru, Russian River, Cloverdale, Mendocino Co., California, United States, Machacamarca, Potosí dept., Bolivia, Kabwe mine, Broken Hill, Kabwe dist., Central Province, Zambia, and Mattagami Lake mine, Mattagami, Quebec, Canada.

SOLD

Perhamite

#BAC61531

Details
Data
Provenance
Resources

Locality: Cobble Hill, West Paris, Oxford Co., Maine, United States
Formula: Ca₃Al_7.7Si₃P₄O_23.5(OH)_14.1·8H₂O
Availability: Sold
Size: 0.7 x 0.6 x 0.3 cm - Thumbnail

Rosette-like crystal group.

Perhamite

Formula: Ca₃Al_7.7Si₃P₄O_23.5(OH)_14.1·8H₂O
Crystal System: Hexagonal
Crystal Habit: Platy
Cleavage: Perfect, None, None
Luster: Vitreous (Glassy)
Color: light brown, white
Streak: white
Class: Hexagonal - Dihexagonal Dipyramidal
Hardness: 5

Collection: William & Anne Cook Collection

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

SOLD

Proustite

with Quartz - #61534

Details
Data
Provenance
Resources

Locality: Uchucchacua mine, Oyon prov., Lima dept., Peru
Formula: Ag₃AsS₃
Availability: Sold
Size: 1.3 x 1.0 x 1.0 cm - Thumbnail
Tagged: sulfide , silver

Superb, stubby, cherry red Proustite crystal.

Proustite

Formula: Ag₃AsS₃
Crystal System: Trigonal
Crystal Habit: Massive, Crystalline - Poor, Blocky
Cleavage: None, None, None
Luster: Sub Metallic
Color: vermilion, reddish gray
Streak: vermilion red
Class: Trigonal - Hexagonal Scalenohedral
Fracture: Brittle - Sectile
Hardness: 2-2.5

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

SOLD

Rosenhahnite

#BAC61509

Details
Data
Provenance
Resources

Locality: Russian River, Cloverdale, Mendocino Co., California, United States
Formula: Ca₃Si₃O₈(OH)₂
Availability: Sold
Size: 6 x 5.5 x 4 cm - Sm Cabinet
Special Info: Type Locality

Compact, beige, radiating crystals. Fairly rare calc-silicate.

Rosenhahnite

Formula: Ca₃Si₃O₈(OH)₂
Crystal System: Triclinic
Crystal Habit: Tabular
Cleavage: Perfect, Good, Good
Luster: Vitreous (Glassy)
Color: beige white, colorless
Streak: white
Class: Triclinic - Pinacoidal
Hardness: 4.5-5

Collection: William & Anne Cook Collection
Special Info: Type Locality

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

Scorzalite

#61044

$55.00 - Available
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Details
Data
Provenance
Resources

Locality: Machacamarca, Potosí dept., Bolivia
Formula: Fe²⁺Al₂(PO₄)₂(OH)₂
Availability: Available
Price: $55.00
Size: 2.5 x 1.5 x 1.8 cm - Thumbnail
Tagged: phosphate

Lustrous deep blue crystals of Scorzalite to 2mm, a mineral which rare form in crystals especially to this size.

Scorzalite

Formula: Fe²⁺Al₂(PO₄)₂(OH)₂
Crystal System: Monoclinic
Crystal Habit: Granular, Massive - Granular
Cleavage: Good, None, None
Luster: Vitreous - Dull
Color: dark blue, greenish blue
Streak: white
Class: Monoclinic - Prismatic
Fracture: Uneven
Hardness: 5.5-6

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

SOLD

Tarbuttite

#BAC61556

Details
Data
Provenance
Resources

Locality: Kabwe mine, Broken Hill, Kabwe dist., Central Province, Zambia
Formula: Zn₂(PO₄)(OH)
Availability: Sold
Size: 3 x 2.5 x 2.5 cm - Thumbnail
Tagged: phosphate

Colorless crystals to 3mm.

Tarbuttite

Formula: Zn₂(PO₄)(OH)
Crystal System: Triclinic
Crystal Habit: Wheat Sheaf, Striated, Prismatic
Cleavage: Perfect, None, None
Luster: Vitreous - Pearly
Color: brown, colorless, green, white, light yellow
Streak: white
Class: Triclinic - Pinacoidal
Fracture: Brittle - Uneven
Hardness: 4

Collection: William & Anne Cook Collection

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

Tellurantimony

with Altaite - #BW61563

$50.00 - Available
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Details
Data
Provenance
Resources

Locality: Mattagami Lake mine, Mattagami, Quebec, Canada
Formula: Sb₂Te₃
Availability: Available
Price: $50.00
Size: 3.5 x 2 x 1 cm - Miniature
Tagged: tellurium
Special Info: Type Locality

The two minerls in matrix are impossible to tell apart even under a microscope. Both are a silvery white. It has been analyzed and is sawed and polished on one side for testing. On the rough sides you can see several of these grains.

Tellurantimony

Formula: Sb₂Te₃
Crystal System: Trigonal
Crystal Habit: Lath
Cleavage: Perfect, None, None
Luster: Metallic
Color: silver white
Class: Trigonal - Hexagonal Scalenohedral
Hardness: 2-2.5

Collection: Bill Wilson Collection
Special Info: Type Locality

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

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