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Rare Minerals

Saturday, 31 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 acanthite, fluorite, lasalite, lawsonite, makatite, and nevadaite and more from places like Vojtěch mine, Příbram, Bohemia, Czech Republic, Denton mine, Hardin Co., Illinois, United States, Pickett Corral mine, Montrose Co., Colorado, United States, Reed Station, Tiburon Peninsula, Marin Co., California, United States, Aris quarries, Windhoek dist., Khomas Region, Namibia, and Gold Quarry mine, Eureka Co., Nevada, United States.

Acanthite

#65546

$295.00 - Available
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Locality: Vojtěch mine, Příbram, Bohemia, Czech Republic
Formula: Ag₂S
Availability: Available
Price: $295.00
Size: 6 x 4 x 3 cm - Sm Cabinet
Tagged: sulfide , silver

Old time specimen from a classic and historic locality. There is a large protrusion of Acanthite crystals that measures 2.5 x 1.5cm filled with several distorted cubic crystals to around 3.5mm.

Acanthite

Formula: Ag₂S
Crystal System: Monoclinic
Crystal Habit: Blocky, Skeletal, Arborescent
Cleavage: poor to none
Luster: Metallic
Color: lead gray, gray, iron black
Streak: shining black
Class: Monoclinic - Prismatic
Fracture: Sectile
Hardness: 2-2.5

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

Fluorite

#65920

$85.00 - Available
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Locality: Denton mine, Hardin Co., Illinois, United States
Formula: CaF₂
Availability: Available
Price: $85.00
Size: 7 x 5 x 6 cm - Sm Cabinet

Display specimen mounted on an acrylic square. It is deep purple in color with an area of Sphalerite crystals at the base. Very nice piece.

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

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

SOLD

Lasalite

with Pascoite - #65926

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Locality: Pickett Corral mine, Montrose Co., Colorado, United States
Formula: Na₂Mg₂(V₁₀O₂₈)·20H₂O
Availability: Sold
Size: 1.3 x 1 x 1 cm - Thumbnail
Tagged: vanadium

Dull orange with bright orange-yellow Pascoite.

Lasalite

Formula: Na₂Mg₂(V₁₀O₂₈)·20H₂O
Crystal System: Monoclinic
Crystal Habit: Prismatic, Efflorescences
Cleavage: None, None, None
Luster: Vitreous (Glassy)
Color: yellow, yellow orange
Streak: yellow
Class: Monoclinic - Prismatic
Fracture: Brittle
Hardness: 1

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

SOLD

Lawsonite

#65940

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Locality: Reed Station, Tiburon Peninsula, Marin Co., California, United States
Formula: CaAl₂Si₂O₇(OH)₂·H₂O
Availability: Sold
Size: 6 x 3.5 x 3 cm - Sm Cabinet

Exceptional blue Lawsonite crystals, the largest (second photo) measuring 9mm. These are extremely hard to find on the market today. This one was found by the Jungles.

Lawsonite

Formula: CaAl₂Si₂O₇(OH)₂·H₂O
Crystal System: Orthorhombic
Crystal Habit: Prismatic, Tabular
Cleavage: Perfect, Perfect, Poor
Luster: Vitreous - Greasy
Color: colorless, white, gray, blue, pinkish
Streak: white
Class: Orthorhombic - Dipyramidal
Fracture: Brittle - Uneven
Hardness: 7.5

Collection: Jungles Collection

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

Makatite

#65528

$250.00 - Available
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Locality: Aris quarries, Windhoek dist., Khomas Region, Namibia
Formula: Na₂Si₄O₈(OH)₂·4H₂O
Availability: Available
Price: $250.00
Size: 8 x 7 x 4 cm - Sm Cabinet

A superb blow-out of rare Makatite as snow-white acicular crystals 2cm across. Most of time these crystal groups average around 5mm across in my experience that is.