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Rare Minerals

Thursday, 08 May 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 lorenzenite, martyite, miargyrite, orientite, petarasite, and phosphosiderite and more from places like Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada, Pack Rat claim, Maricopa Co., Arizona, United States, Kelly mine, Randsburg dist., San Bernardino Co., California, Bueycito, Firmeza dist., Santiago de Cuba Prov., Cuba, and Minas Gerais, Brazil.

SOLD

Lorenzenite

#65836

Details
Data
Provenance
Resources

Locality: Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada
Formula: Na₂Ti₂O₃(Si₂O₆)
Availability: Sold
Size: 7 x 4.5 x 2 cm - Sm Cabinet

Colorless, acicular divergent spray of Lorenzenite to 6mm.

Lorenzenite

Formula: Na₂Ti₂O₃(Si₂O₆)
Crystal System: Orthorhombic
Crystal Habit: Acicular, Granular, Massive - Fibrous
Cleavage: Distinct, Distinct, None
Luster: Vitreous - Greasy
Color: brown, colorless, green, white, light blue
Streak: light brownish yellow
Class: Orthorhombic - Dipyramidal
Fracture: Brittle - Conchoidal
Hardness: 6

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

SOLD

Martyite

with Magnesiopascoite - #65876

Details
Data
Provenance
Resources

Locality: Pack Rat claim, Maricopa Co., Arizona, United States
Formula: Zn₃V₂O₇(OH)₂·2H₂O
Availability: Sold
Size: 2.7 x 1.8 x 0.5 cm - Thumbnail
Tagged: vanadium

Reddish orange Martyite in tight aggregates with bright orange Magnesiopascoite.

Martyite

Formula: Zn₃V₂O₇(OH)₂·2H₂O
Crystal System: Trigonal
Crystal Habit: Platy, Rosette
Cleavage: Perfect, Good, None
Luster: Adamantine
Color: yellow orange, red orange
Streak: pale yellow orange
Class: Trigonal - Hexagonal Scalenohedral
Hardness: 3

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

SOLD

Miargyrite

#61297

Details
Data
Provenance
Resources

Locality: Kelly mine, Randsburg dist., San Bernardino Co., California
Formula: AgSbS₂
Availability: Sold
Size: 2 x 1.3 x 1.3 cm - Thumbnail
Tagged: sulfide , silver
Special Info: EDS Confirmed

A good specimen with several shiny black and striated crystals of Miargyrite.

Miargyrite

Formula: AgSbS₂
Crystal System: Monoclinic
Crystal Habit: Euhedral Crystals, Disseminated, Massive
Cleavage: Imperfect, None, None
Luster: Sub Metallic
Color: steel gray, lead gray, blackish red, reddish gray
Streak: cherry red
Class: Monoclinic - Prismatic
Fracture: Brittle
Hardness: 2-2.5

Special Info: EDS Confirmed

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

SOLD

Orientite

#65850

Details
Data
Provenance
Resources

Locality: Bueycito, Firmeza dist., Santiago de Cuba Prov., Cuba
Formula: Ca₈Mn³⁺₁₀(SiO₄)₃(Si₃O₁₀)₃(OH)₁₀·4H₂O
Availability: Sold
Size: 2 x 2 x 1 cm - Thumbnail
Special Info: Type Locality

This is the type locality for Orientite, a very rare Ca-Mn silicate found in only seven places on Earth (so far). I could not capture the fantastic little prismatic crystals, which glow a vibrant-electric red color. Excellent specimen which comes with an old handwritten label (prov. tab).