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Mixed Minerals

Sunday, 21 May 2023 05:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including ettringite, eulytine, frondelite, haiweeite, iranite, and joliotite and more from places like N'Chwaning mines, Kuruman, Northern Cape prov., South Africa, Schneeberg dist., Erzgebirge, Saxony, Germany, Tip Top mine, Custer Co., South Dakota, United States, Teofilo Otoni, Minas Gerais, Southeast Region, Brazil, Chah-Khouni mine, Anarak dist, Esfahan, Iran, and Krunkelbach Valley, Menzenschwand, Freiburg, Baden-W�rttemberg, Germany.

SOLD

Ettringite

#BAC61704

Details
Data
Provenance
Resources

Locality: N'Chwaning mines, Kuruman, Northern Cape prov., South Africa
Formula: Ca₆Al₂(SO₄)₃(OH)₁₂·26H₂O
Availability: Sold
Size: 2.5 x 1.8 x 1.3 cm - Thumbnail

Tiny, 0.5 to 0.75mm, glassy yellow, prismatic crystals.

Ettringite

Formula: Ca₆Al₂(SO₄)₃(OH)₁₂·26H₂O
Crystal System: Hexagonal
Crystal Habit: Acicular
Cleavage: Perfect, None, None
Luster: Vitreous (Glassy)
Color: colorless, white
Streak: white
Class: Hexagonal - Dihexagonal Dipyramidal
Hardness: 2-2.5

Collection: William & Anne Cook Collection

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

Eulytine

#BAC61708

$65.00 - Available
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Provenance
Resources

Locality: Schneeberg dist., Erzgebirge, Saxony, Germany
Formula: Bi₄(SiO₄)₃
Availability: Available
Price: $65.00
Size: 3.5 x 3 x 2.3 cm - Miniature

Glassy brown crystals in a group 1mm wide. Complicated, modified crystals, with trianguler and square reflections consistent with crystallography.

Eulytine

Formula: Bi₄(SiO₄)₃

Collection: William & Anne Cook Collection

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

SOLD

Frondelite

- Rockbridgeite - #61689

Details
Data
Provenance
Resources

Locality: Tip Top mine, Custer Co., South Dakota, United States
Formula: Mn²⁺Fe³⁺₄(PO₄)₃(OH)₅
Availability: Sold
Size: 6.5 x 4.5 x 2.5 cm - Sm Cabinet
Tagged: phosphate , pegmatite mineral

Long brownish red acicular crystals in matrix. I've tested some of these and they usually turn out to be Frondelite when brown and Rockbridegite when black.

Frondelite

Formula: Mn²⁺Fe³⁺₄(PO₄)₃(OH)₅
Crystal System: Orthorhombic
Cleavage: Perfect, Distinct, Distinct
Luster: Vitreous - Dull
Color: brown, brown green, brownish black, green black, dark green
Streak: brownish gray
Class: Orthorhombic - Dipyramidal
Fracture: Brittle - Uneven
Hardness: 4.5

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

Haiweeite

with Uranophane. - #60977

$175.00 - Available
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Locality: Teofilo Otoni, Minas Gerais, Southeast Region, Brazil
Formula: Ca(UO₂)₂Si₅O₁₂(OH)₂·3H₂O
Availability: Available
Price: $175.00
Size: 6 x 3 x 3.5 cm - Sm Cabinet
Special Info: Radioactive!!

Lemon yellow sprays of Haiweeite to 3mm with glassy yellow Uranophane or Parauranophane with inclined terminations and dark purple cubes of Fluorite.

Haiweeite

Formula: Ca(UO₂)₂Si₅O₁₂(OH)₂·3H₂O
Crystal System: Orthorhombic
Crystal Habit: Microscopic Crystals, Spherical, Aggregates
Cleavage: Good, None, None
Luster: Pearly
Color: greenish yellow, light yellow
Streak: white
Class: Orthorhombic - Dipyramidal
Hardness: 3.5

Special Info: Radioactive!!

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

Iranite

with Phoenicochroite - #BAC61687

$195.00 - Available
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Locality: Chah-Khouni mine, Anarak dist, Esfahan, Iran
Formula: CuPb₁₀(CrO₄)₆(SiO₄)₂(OH)₂
Availability: Available
Price: $195.00
Size: 7 x 3.5 x 2.5 cm - Sm Cabinet
Tagged: copper

Glassy prismatic crystals with a greasy luster and bright orange Phoenicochroite. Excellent rich specimen. See prov. tab for unique labels.

Iranite

Formula: CuPb₁₀(CrO₄)₆(SiO₄)₂(OH)₂
Crystal System: Triclinic
Luster: Vitreous (Glassy)
Color: brownish yellow, yellow, honey brown
Streak: yellow
Class: Triclinic - Pedial
Hardness: 3

Collection: William & Anne Cook Collection

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

SOLD

Joliotite

with Pyrite - #BAC61657

Details
Data
Provenance
Resources

Locality: Krunkelbach Valley, Menzenschwand, Freiburg, Baden-W�rttemberg, Germany
Formula: (UO₂)(CO₃)·2H₂O
Availability: Sold
Size: 2.5 x 2 x 1.5 cm - Thumbnail
Tagged: carbonate
Special Info: Radioactive!!
Special Info: Type Locality
Special Info: XRD Confirmed

Orange-red masses of Joliotite tested by XRD. It is associated with Arsenopyrite and Pytite. See provenance tab for analytical papers.

Joliotite

Formula: (UO₂)(CO₃)·2H₂O
Crystal System: Orthorhombic
Crystal Habit: Spherical, Scaly
Cleavage: Distinct, None, None
Color: lemon yellow
Streak: yellow
Class: Orthorhombic
Hardness: 1.5-2

Collection: William & Anne Cook Collection
Special Info: Radioactive!!
Special Info: Type Locality
Special Info: XRD Confirmed

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

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