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Rare & Systematic Minerals

Sunday, 07 May 2023 04:00 PM

Introducing the "Rare & Systematic Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including cabalzarite, gaspeite, gibbsite, graeserite, holmquistite, and kobellite and more from places like Falotta, Tinzen, Sursass, Graubünden, Switzerland, Widgiemooltha, Western Australia, Australia, Hargreaves, Ouro Preto, Minas Gerais, Brazil, Gorb, Lärchultini, Binntal, Wallis, Switzerland, Harding mine, Taos Co., New Mexico, United States, and Superior Stone quarry, Wake Co., North Carolina, United States.

Cabalzarite

#BAC61610

$95.00 - Available
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Locality: Falotta, Tinzen, Sursass, Graubünden, Switzerland
Formula: CaMg₂(AsO₄)₂·2H₂O
Availability: Available
Price: $95.00
Size: 1.3 x 0.9 x 0.8 cm - Thumbnail
Special Info: Type Locality

Salmon pink platy crystals in 1mm and less groups. Cabalzarite is a rare arsenate found in only three worldwide localities. On this specimen the crystals are on two sides.

Cabalzarite

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

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

SOLD

Gaspeite

#BAC61602

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Data
Provenance
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Locality: Widgiemooltha, Western Australia, Australia
Formula: NiCO₃
Availability: Sold
Size: 6 x 5 x 2 cm - Sm Cabinet
Tagged: nickel

Lime green globular masses. The color on the close-up photo's should be more like that of the first overall photo..

Gaspeite

Formula: NiCO₃
Crystal System: Trigonal
Cleavage: Good, None, None
Luster: Vitreous - Dull
Color: light green
Streak: yellow green
Class: Trigonal - Hexagonal Scalenohedral
Fracture: Uneven
Hardness: 4-5

Collection: William & Anne Cook Collection

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

SOLD

Gibbsite

#BAC61603

Details
Data
Provenance
Resources

Locality: Hargreaves, Ouro Preto, Minas Gerais, Brazil
Formula: Al(OH)₃
Availability: Sold
Size: 5 x 3 x 3.5 cm - Miniature

Stalactitic Gibbsite with concentric cross-sections.

Gibbsite

Formula: Al(OH)₃
Crystal System: Monoclinic
Crystal Habit: Spherical, Stalactitic, Earthy
Cleavage: Perfect, None, None
Luster: Vitreous - Pearly
Color: bluish, green, green white, gray, gray white
Streak: white
Class: Monoclinic - Prismatic
Fracture: Tough
Hardness: 2.5-3

Collection: William & Anne Cook Collection

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

Graeserite

#BAC61615

$75.00 - Available
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Locality: Gorb, Lärchultini, Binntal, Wallis, Switzerland
Formula: Fe₄Ti₃AsO₁₃(OH)
Availability: Available
Price: $75.00
Size: 3 x 1.5 x 0.8 cm - Thumbnail
Special Info: Type Locality

Tiny 1mm and less acicular crystals throughout specimen. Graeserite is a rare titanium mineral with arsenic and found only in three places in the world.