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Rare & Cabinet Minerals

Sunday, 05 March 2023 06:00 PM

Introducing the "Rare & Cabinet Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including naumannite, nickenichite, strengite, and verplanckite and more from places like Fire Creek mine, Lander Co., Nevada, United States, Tolbachik Volcano, Kamchatka, Russia, York mine, Polk Co., Arkansas, United States, and Esquire #7 claim, Big Creek, Fresno Co., California, United States.

Naumannite

#61112

$195.00 - Available
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Locality: Fire Creek mine, Lander Co., Nevada, United States
Formula: Ag₂Se
Availability: Available
Price: $195.00
Size: 2.1 x 1.1 x 1 cm - Thumbnail
Tagged: selenium , silver

1mm crystals, some with trainglar faces some as plates with Quartz. Excellent specimen.

Naumannite

Formula: Ag₂Se
Crystal System: Orthorhombic
Crystal Habit: Massive
Cleavage: Perfect, Perfect, Perfect
Luster: Metallic
Color: grayish black, iron black
Streak: black
Class: Orthorhombic - Disphenoidal
Fracture: Sectile
Hardness: 2.5

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

Nickenichite

#57800

$275.00 - Available
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Locality: Tolbachik Volcano, Kamchatka, Russia
Formula: (Na,Ca,Cu)_1.6(Mg,Fe³⁺,Al)₃(AsO₄)₃
Availability: Available
Price: $275.00
Size: 3 x 2.5 x 1.5 cm - Thumbnail
Tagged: arsenate , copper
Special Info: XRD Confirmed
Special Info: EDS Confirmed

Nickenichite is named for the village of Nickenich, Germany and nearby the Nickenicher Sattel volcano. At this locality, it also occurs in volcanic fumarole rich in vanadium vapors. This specimen contains, beautiful deep azure blue micro crystals to about 1mm. This is the second worldwide occurence of this rare arsenate far superior to the type locality. It is verified by Dr. Igor Pekov.

The exact locality is: Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption (Main Fracture), Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia

Nickenichite

Formula: (Na,Ca,Cu)_1.6(Mg,Fe³⁺,Al)₃(AsO₄)₃
Crystal System: Monoclinic
Crystal Habit: Prismatic
Cleavage: Perfect, Good, Good
Luster: Vitreous (Glassy)
Color: greenish blue, light blue
Class: Monoclinic - Prismatic
Hardness: 3

Special Info: XRD Confirmed
Special Info: EDS Confirmed

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

Strengite

with Cacoxenite, Beraunite and Kidwellite - #BAC61156

$325.00 - Available
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Locality: York mine, Polk Co., Arkansas, United States
Formula: Fe³⁺PO₄·2H₂O
Availability: Available
Price: $325.00
Size: 4.5 x 3 x 3.5 cm - Miniature
Tagged: phosphate

A colorful, choice specimen of purple crystal groups of Strengite measuring 1 to 2mm on Cacoxenite which forms balls and cross-sections of golden fibers. Outward from the cavity is dull green Kidwellite and finally lining all this is deep red Beraunite. I love these combination specimens from the York mine. They are simply some of the best assemblages of phoasphate minerals you'll see.

Strengite

Formula: Fe³⁺PO₄·2H₂O
Crystal System: Orthorhombic
Crystal Habit: Spherical, Radial, Botryoidal
Cleavage: Good, Poor, None
Luster: Vitreous (Glassy)
Color: colorless, pale violet, deep violet, red, carmine red
Streak: white
Class: Orthorhombic - Dipyramidal
Fracture: Brittle - Conchoidal
Hardness: 3.5

Collection: William & Anne Cook Collection

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

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Verplanckite

#59861

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Locality: Esquire #7 claim, Big Creek, Fresno Co., California, United States
Formula: Ba₄Mn²⁺₂Si₄O₁₂(OH,H₂O)₃Cl₃
Availability: Sold
Size: 7.5 x 4.5 x 2.5 cm - Sm Cabinet
Special Info: Type & Only Locality

Orange grains of little prismatic crystals to 1mm in Sanbornite matrix with sulfides. This is the type and only locality in the world. It was collected by Robert Walstrom and comes with his signed label.

Verplanckite

Formula: Ba₄Mn²⁺₂Si₄O₁₂(OH,H₂O)₃Cl₃
Crystal System: Hexagonal
Crystal Habit: Radial, Prismatic, Aggregates
Cleavage: Good, Indistinct, None
Luster: Vitreous (Glassy)
Color: brownish yellow, brownish orange
Streak: light orange
Class: Hexagonal - Dihexagonal Dipyramidal
Hardness: 2.5-3

Collection: Robert E. Walstrom collection
Special Info: Type & Only Locality

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

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