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Rare Minerals

Sunday, 09 January 2022 06:00 PM

Introducing the "Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including anthophyllite, antlerite, argentojarosite, aubertite, baricite, and bassetite and more from places like Richmond Soapstone quarry, Cheshire Co., New Hampshire, United States, Chuquicamata mine, El Loa Prov., Antofagasta, Chile, Santa Ana mine, Santa Ana, Mun. de Onavas, Sonora, Mexico, Big Fish River, Dawson dist., Yukon Territory, Canada, and Arcu su Linnarbu, Capoterra, Cagliari prov., Sardinia, Italy.

SOLD

Anthophyllite

with Magnesio-hornblende - #BW57394

Details
Data
Provenance
Resources

Locality: Richmond Soapstone quarry, Cheshire Co., New Hampshire, United States
Formula: □Mg₇Si₈O₂₂(OH)₂
Availability: Sold
Size: 7.5 x 5 x 2 cm - Sm Cabinet

Light greyish green Anthophyllite with dark green Magnesio-hornblende.

Anthophyllite

Formula: [box]Mg₇Si₈O₂₂(OH)₂
Crystal System: Orthorhombic
Crystal Habit: Fibrous, Lamellar, Massive
Cleavage: Perfect, Distinct, Distinct
Luster: Vitreous - Pearly
Color: white, greenish gray, green, clove brown, brownish green
Streak: gray
Class: Orthorhombic - Dipyramidal
Fracture: Conchoidal
Hardness: 5-6

Collection: Bill Wilson Collection

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

SOLD

Antlerite

#BW57299

Details
Data
Provenance
Resources

Locality: Chuquicamata mine, El Loa Prov., Antofagasta, Chile
Formula: Cu²⁺₃SO₄(OH)₄
Availability: Sold
Size: 4 x 2.5 x 2.5 cm - Miniature
Tagged: copper

Thick tabular emerald green crystals to 2mm in thick placement.

Antlerite

Formula: Cu²⁺₃SO₄(OH)₄
Crystal System: Orthorhombic
Crystal Habit: Acicular, Concretionary, Reniform
Cleavage: Perfect, None, None
Luster: Vitreous (Glassy)
Color: green, light green, emerald green, black, black green
Streak: pale green
Class: Orthorhombic - Dipyramidal
Fracture: Uneven
Hardness: 3

Collection: Bill Wilson Collection

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

SOLD

Argentojarosite

#BW57298

Details
Data
Provenance
Resources

Locality: Santa Ana mine, Santa Ana, Mun. de Onavas, Sonora, Mexico
Formula: AgFe³⁺₃(SO₄)₂(OH)₆
Availability: Sold
Size: 5 x 2.5 x 3 cm - Miniature
Tagged: silver

Greenish yellow, waxy-looking Argentojarosite with red Carminite.

Argentojarosite

Formula: AgFe³⁺₃(SO₄)₂(OH)₆
Crystal System: Trigonal
Crystal Habit: Micaceous
Cleavage: Perfect, None, None
Luster: Vitreous (Glassy)
Color: brown, yellow, yellow brown
Streak: yellow
Class: Trigonal - Ditrigonal Pyramidal
Hardness: 3.5-4.5

Collection: Bill Wilson Collection

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

SOLD

Aubertite

with Copiapite - #BW57380

Details
Data
Provenance
Resources

Locality: Chuquicamata mine, El Loa Prov., Antofagasta, Chile
Formula: Cu²⁺Al(SO₄)₂Cl·14H₂O
Availability: Sold
Size: 4 x 3.5 x 3 cm - Miniature
Tagged: copper

Light blue earthy Aubertite throughout the mass. The specimen also carries Quartz crystals, which look blue from the adjacent Aubertite. In the photos the crystals that are blue are just Quartz, not Aubertite. For a simple copper-aluminum sulfate it is only found in maybe a few dozen worldwide localities.

Aubertite

Formula: Cu²⁺Al(SO₄)₂Cl·14H₂O
Crystal System: Triclinic
Cleavage: Perfect, None, None
Luster: Vitreous (Glassy)
Color: azure, blue
Streak: light blue
Class: Triclinic - Pedial
Hardness: 2-3

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

SOLD

Baricite

#BW57370

Details
Data
Provenance
Resources

Locality: Big Fish River, Dawson dist., Yukon Territory, Canada
Formula: Mg₃(PO₄)₂·8H₂O
Availability: Sold
Size: 9 x 2.5 x 3.5 cm - Sm Cabinet
Tagged: phosphate

The specimen represents a good example of mineralized Quartz veining with open spaces. The Quartz crystals have grown inward, perpendicular to the walls of the vein. The vein is mineralized with phosphate, in this case Baricite, a Mn-Fe phosphate. Baricite was first found at this locality and has since been found in only another four localities worldwide. It is the magnesium analog of Vivianite. The Baricite in this specimen is a metallic blue with lamellar crystals to 2.5cm.