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Mixed Minerals

Friday, 30 August 2024 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including tetrahedrite, tilleyite, wightmanite, wolsendorfite, and zinkenite and more from places like Clausthal, Harz Mtns., Niedersachsen, Germany, Commercial quarry, Crestmore, Riverside Co., California, United States, Shinkolobwe, Katanga, Democratic Republic of Congo, and Wolfsberg, Harz, Germany.

Tetrahedrite

with Galena - #64600

$225.00 - Available
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Locality: Clausthal, Harz Mtns., Niedersachsen, Germany
Formula: Cu₁₂Sb₄S₁₃
Availability: Available
Price: $225.00
Size: 7.5 x 6 x 2.5 cm - Sm Cabinet
Tagged: sulfide , copper
Special Info: Antique Specimen

Excellent old specimen with Tetrahedrite crysatls to 1cm. Some of the crystals are coated with Pyrite. It is another cool antique specimen with an old label (see prov tab).

Tetrahedrite

Formula: Cu₁₂Sb₄S₁₃
Crystal System: Isometric
Crystal Habit: Massive - Granular, Massive
Cleavage: None, None, None
Luster: Metallic
Color: iron gray, black, steel gray
Streak: black
Class: Isometric - Hextetrahedral
Fracture: Uneven
Hardness: 3.5-4

Collection: Ex. A.E. Seaman Museum
Special Info: Antique Specimen

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

SOLD

Tilleyite

in Calcite - #64619

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Provenance
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Locality: Commercial quarry, Crestmore, Riverside Co., California, United States
Formula: Ca₅Si₂O₇(CO₃)₂
Availability: Sold
Size: 5.5 x 4.5 x 4 cm - Sm Cabinet
Tagged: carbonate

Brownish white striated sheets of Tilleyite to 2cm long in blue Calcite.

Tilleyite

Formula: Ca₅Si₂O₇(CO₃)₂
Crystal System: Monoclinic
Cleavage: Perfect, Good, None
Color: colorless, white
Streak: white
Class: Monoclinic - Prismatic
Hardness: -

Collection: Fred DeVito Collection

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

SOLD

Wightmanite

in Calcite - #64618

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Locality: Commercial quarry, Crestmore, Riverside Co., California, United States
Formula: Mg₅O(BO₃)(OH)₅·2H₂O
Availability: Sold
Size: 4 x 2.3 x 1 cm - Miniature

White prismatic crystals to 1.2cm in bluish Calcite.

Wightmanite

Formula: Mg₅O(BO₃)(OH)₅·2H₂O
Crystal System: Monoclinic
Cleavage: Perfect, Distinct, None
Luster: Vitreous (Glassy)
Color: colorless, light green
Streak: white
Class: Monoclinic - Prismatic
Hardness: 5.5

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

SOLD

Wolsendorfite

with Studtite & Uranophane - #64636

Details
Data
Provenance
Resources

Locality: Shinkolobwe, Katanga, Democratic Republic of Congo
Formula: Pb₇(UO₂)₁₄O₁₉(OH)₄·12H₂O
Availability: Sold
Size: 4 x 3 x 2.5 cm - Miniature
Special Info: Poisonous!!

Stunning specimen loaded with beautiful crystals of Studtite. The Studtite are the opaque acicular crystals in the second photo. That group is 7mm. The Uranophane are the smaller crystals with the black centers. The black centers are unidentified crystals. The Wolsendorfite occurs as crystal plates in the vug and massive in the matrix with Uraninite.