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Mixed Minerals

Sunday, 27 December 2020 07:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including eudialyte, fluorite, gypsum, helvine, labuntsovite-mn, and londonite and more from places like Mont Saint-Hilaire, Rouville Co., Quebec, Canada, Mina Ojuela, Mapimi, Durango, Mexico, Naica, Mun. de Saucillo, Chihuahua, Mexico, Sunnyside mine, Silverton, San Juan Co., Colorado, United States, and Antsongomvato mine, Betroka dist., Antananarivo, Madagascar.

SOLD

Eudialyte

#DC54866

Details
Data
Provenance
Resources

Locality: Mont Saint-Hilaire, Rouville Co., Quebec, Canada
Formula: Na₁₅Ca₆Fe₃Zr₃Si(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂
Availability: Sold
Size: 6 x 6 x 2.5 cm - Sm Cabinet

A 6mm red Eudialyte crystal in vug with several smaller embedded in the matrix.

Eudialyte

Formula: Na₁₅Ca₆Fe₃Zr₃Si(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂
Crystal System: Trigonal
Crystal Habit: Massive - Granular, Tabular
Cleavage: Imperfect, None, None
Luster: Vitreous (Glassy)
Color: pinkish red, red, yellow, yellowish brown, violet
Streak: white
Class: Trigonal - Hexagonal Scalenohedral
Fracture: Uneven
Hardness: 5-5.5

Collection: Don Cooke Collection

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

Fluorite

with Calcite - #AH54903

$60.00 - Available
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Details
Data
Provenance
Resources

Locality: Mina Ojuela, Mapimi, Durango, Mexico
Formula: CaF₂
Availability: Available
Price: $60.00
Size: 10 x 8 x 5 cm - Cabinet

Very faint purple Fluorite crystals to 4cm on edge with an interesting silky luster from countless parallel overgrowths. On the right side is a group of Calcite crystals with rhombic crystals to 5mm.

Fluorite

Formula: CaF₂
Crystal System: Isometric
Crystal Habit: Crystalline - Coarse, Massive - Granular, Disseminated
Cleavage: Three perfect, octahedral cleavages.
Luster: Vitreous (Glassy)
Color: purple, clear, yellow, green, red, blue
Streak: white
Geological Setting: Occurs in a wide range of geologic environments including low temperature Missississippi Valley lead-zinc deposits, hydrothermal gold deposits, Alpine cleft metamorphic environments
Class: Isometric - Hexoctahedral
Fracture: Uneven
Hardness: 4

Collection: Arnold G Hampson Collection

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

SOLD

Gypsum

var. selenite - #AH54897

Details
Data
Provenance
Resources

Locality: Naica, Mun. de Saucillo, Chihuahua, Mexico
Formula: CaSO₄·2H₂O
Availability: Sold
Size: 18 x 7 x 6 cm - Cabinet

A large cabinet specimen of selenite, the clear variety of Gypsum. The specimen is nearly perfect with some faces being transparent and giving you an opportunty to view inside of this amazing piece. If you look close enough, you will see phantom crystal faces inside. You will also see little reindeer with a sled attached and Santa waiving hello. Shake it, and it snows.

Gypsum

Formula: CaSO₄·2H₂O
Crystal System: Monoclinic
Crystal Habit: Tabular, Crystalline - Coarse, Massive - Fibrous
Cleavage: Perfect, Distinct, Distinct
Luster: Pearly
Color: white, colorless, yellowish white, greenish white, brown
Streak: white
Class: Monoclinic - Prismatic
Fracture: Fibrous
Hardness: 2

Collection: Arnold G Hampson Collection

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

SOLD

Helvine

with Pyroxmangite - #AH53963

Details
Data
Provenance
Resources

Locality: Sunnyside mine, Silverton, San Juan Co., Colorado, United States
Formula: Mn²⁺₄(BeSiO₄)₃S
Availability: Sold
Size: 5.5 x 5 x 2.5 cm - Sm Cabinet
Tagged: beryllium

Yellow Helvine with pink Pyroxmangite. No crystals.

Helvine

Collection: Arnold G Hampson Collection

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

SOLD

Labuntsovite-Mn

#DC54863

Details
Data
Provenance
Resources

Locality: Mont Saint-Hilaire, Rouville Co., Quebec, Canada
Formula: Na₄K₄Mn²⁺₂Ti₈O₄(Si₄O₁₂)₄(OH)₄·10-12H₂O
Availability: Sold
Size: 5 x 4 x 2.5 cm - Miniature

Rich specimen of Labuntsovite with a large group to 5mm and singles and sprays a bit smaller. Very nice, enjoyable specimen.

Labuntsovite-Mn

Formula: Na₄K₄Mn²⁺₂Ti₈O₄(Si₄O₁₂)₄(OH)₄·10-12H₂O
Crystal System: Monoclinic
Crystal Habit: Prismatic
Cleavage: Perfect, None, None
Luster: Greasy (Oily)
Color: brownish yellow, pink, reddish brown
Streak: white
Class: Monoclinic - Prismatic
Fracture: Brittle - Subconchoidal
Hardness: 6

Collection: Don Cooke Collection

Mineralpedia: View Labuntsovite-Mn
On Dakota Matrix: Previously Sold Labuntsovite-Mn
On Dakota Matrix: Other Available Labuntsovite-Mn
WebMineral: View Labuntsovite-Mn
Mindat: View Labuntsovite-Mn

SOLD

Londonite

#50550

Details
Data
Provenance
Resources

Locality: Antsongomvato mine, Betroka dist., Antananarivo, Madagascar
Formula: CsBe₅Al₄B₁₁O₂₈
Availability: Sold
Size: 6 x 4 x 4 cm - Sm Cabinet
Tagged: beryllium , pegmatite mineral

A large, euhedral crystal to 1.1cm with sharp faces and nice light green color. Londonite contains Cesium and Beryllium and is very rare. The specimen itself is from Dr. David London with analytical information.

Londonite

Formula: CsBe₅Al₄B₁₁O₂₈
Crystal System: Isometric
Crystal Habit: Euhedral Crystals
Cleavage: None, None, None
Luster: Vitreous (Glassy)
Color: colorless, white, yellow
Streak: white
Class: Isometric - Hextetrahedral
Fracture: Brittle - Conchoidal
Hardness: 8

Collection: Dr. David London Collection

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

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