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Rare Minerals

Wednesday, 01 January 2025 06:00 PM

Introducing the "Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including franckeite, ganomalite, gianellaite, goosecreekite, sinhalite, and wayneburnhamite and more from places like Pirquitas Ag-Sn Deposit, Rinconada Dept., Jujuy, Argentina, Commercial quarry, Crestmore, Riverside Co., California, Terlingua dist., Brewster Co., Texas, United States, Jalgaon dist., Maharashtra, India, Rudeville, Orange Co., New York, United States, and Commercial quarry, Crestmore, Riverside Co., California, United States.

Franckeite

(arsenian) - #BAC65187

$35.00 - Available
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Locality: Pirquitas Ag-Sn Deposit, Rinconada Dept., Jujuy, Argentina
Formula: Fe²⁺(Pb,Sn²⁺)₆Sn⁴⁺₂Sb³⁺₂S₁₄
Availability: Available
Price: $35.00
Size: 2.2 x 1 x 0.8 cm - Thumbnail
Tagged: sulfide , tin

Very fine granular Franckeite.

Franckeite

Formula: Fe²⁺(Pb,Sn²⁺)₆Sn⁴⁺₂Sb³⁺₂S₁₄
Crystal System: Triclinic
Crystal Habit: Tabular, Massive - Fibrous, Radial
Cleavage: Perfect, None, None
Luster: Metallic
Color: grayish black, blackish gray
Streak: grayish black
Class: Triclinic - Pinacoidal
Fracture: Flexible
Hardness: 2.5

Collection: William & Anne Cook Collection

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

SOLD

Ganomalite

with Nasonite (?) - #65233

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Locality: Commercial quarry, Crestmore, Riverside Co., California
Formula: Pb₃Ca₂(SiO₄)(Si₂O₇)
Availability: Sold
Size: 4.7 x 4 x 2 cm - Miniature

Grey masses of Ganomalite with blue Nassonite (?).

Ganomalite

Formula: Pb₃Ca₂(SiO₄)(Si₂O₇)
Crystal System: Trigonal
Crystal Habit: Prismatic, Massive - Granular
Cleavage: Good, None, None
Luster: Vitreous - Adamantine
Color: colorless, gray, white
Streak: white
Class: Trigonal - Pyramidal
Hardness: 3

Collection: Fred DeVito Collection

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

SOLD

Gianellaite

#65237

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Locality: Terlingua dist., Brewster Co., Texas, United States
Formula: Hg₄SO₄N₂
Availability: Sold
Size: 4.3 x 3.5 x 1.2 cm - Miniature
Special Info: Raman

The Gianellaite occur as yellow crystals with orange red Cinnabar.

Gianellaite

Formula: Hg₄SO₄N₂
Crystal System: Isometric
Color: yellow, straw yellow
Streak: light yellow
Class: Isometric - Hextetrahedral
Hardness: 3

Special Info: Raman

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

SOLD

Goosecreekite

#BN65189

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Locality: Jalgaon dist., Maharashtra, India
Formula: Ca(Si₆Al₂)O₁₆·5H₂O
Availability: Sold
Size: 5 x 5 x 3.5 cm - Miniature

This is a large semi- spherical group Goosecreekite composed of wedge-shaped crystals to 6mm. Goosecreekite is a fairly rare zeolite originally found in Virginia. This locality undoubtedly takes the grand prize for best of species.

Goosecreekite

Formula: Ca(Si₆Al₂)O₁₆·5H₂O
Crystal System: Monoclinic
Crystal Habit: Euhedral Crystals, Aggregates
Cleavage: Perfect, None, None
Luster: Vitreous (Glassy)
Color: colorless, white
Streak: white
Class: Monoclinic - Sphenoidal
Hardness: 4.5

Collection: Dr. Buford Nichols Collection

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

SOLD

Sinhalite

with Chondrodite - #BAC64384

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Locality: Rudeville, Orange Co., New York, United States
Formula: MgAlBO₄
Availability: Sold
Size: 6.5 x 4 x 4 cm - Sm Cabinet

Great specimen of two rare minerals: light tan Sinhalite with some crystal faces to 1.3cm and reddish brown Chondrodite.

Sinhalite

Formula: MgAlBO₄
Crystal System: Orthorhombic
Luster: Vitreous (Glassy)
Color: brown, brown pink, colorless, yellow, light pink
Streak: white
Class: Orthorhombic - Dipyramidal
Fracture: Conchoidal
Hardness: 6.5-7

Collection: William & Anne Cook Collection

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

SOLD

Wayneburnhamite

#65219

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Provenance
Resources

Locality: Commercial quarry, Crestmore, Riverside Co., California, United States
Formula: Pb₉Ca₆(Si₂O₇)₃(SiO₄)₃
Availability: Sold
Size: 2 x 0.9 x 0.3 cm - Thumbnail
Special Info: Type Locality

Blue somewhat glassy masses of Wayneburnhamite. No crystals. The piece is actually a split off of the type specimen, which was described by Kampf. It has a flat, sawed side like the type specimen. I found the specimen in the Fred DeVito collection, which I aqcuired years ago. The paper can be found onthe RRUFF website or click here.

Wayneburnhamite

Formula: Pb₉Ca₆(Si₂O₇)₄(SiO₄)O
Crystal System: Hexagonal
Crystal Habit: hexagonal tablets and prisms, clustars
Cleavage: not observed
Luster: vitreous to resinous
Color: blue
Streak: white
Geological Setting: high temperature system involving large scale metasomatism of limestone as a result of quartz monzonite porphyry, volatile components from hydrothermal fluids rich in sulfides.
Fracture: conchoidal
Hardness: 3.5

Collection: Fred DeVito Collection
Special Info: Type Locality

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

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