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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 janhaugite, lasalite, lawsonite, lucchesiite, makatite, and molybdofornacite and more from places like Gjerdingselva, Nordmarka, Lunner, Oppland, Norway, Pickett Corral mine, Montrose Co., Colorado, United States, Reed Station, Tiburon Peninsula, Marin Co., California, United States, Mirošov, Žďár nad Sázavou dist., Vysočina, Czech Republic, Aris quarries, Windhoek dist., Khomas Region, Namibia, and Alice mine, Goodsprings dist., Clark Co., Nevada, United States.

SOLD

Janhaugite

#BAC65909

Details
Data
Provenance
Resources

Locality: Gjerdingselva, Nordmarka, Lunner, Oppland, Norway
Formula: (Na,Ca)₃(Mn²⁺,Fe²⁺)₃(Ti,Zr,Nb)₂(Si₂O₇)₂O₂(OH,F)₂
Availability: Sold
Size: 2 x 1.3 x 0.5 cm - Thumbnail
Special Info: Type Locality

Orange subhedral mass showing prism forms to 1mm. There is suppose to be Dalyite on this specimen. I'm not familiar that mineral so could not say.

Janhaugite

Formula: (Na,Ca)₃(Mn²⁺,Fe²⁺)₃(Ti,Zr,Nb)₂(Si₂O₇)₂O₂(OH,F)₂
Crystal System: Monoclinic
Crystal Habit: Prismatic, Striated, Anhedral Grains
Cleavage: Distinct, None, None
Luster: Vitreous (Glassy)
Color: reddish brown
Streak: light brown
Class: Monoclinic - Prismatic
Fracture: Brittle
Hardness: 5

Collection: William & Anne Cook Collection
Special Info: Type Locality

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

SOLD

Lasalite

with Pascoite - #65926

Details
Data
Provenance
Resources

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

Details
Data
Provenance
Resources

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

SOLD

Lucchesiite

#BAC65924

Details
Provenance
Resources

Locality: Mirošov, Žďár nad Sázavou dist., Vysočina, Czech Republic
Formula: CaFe²⁺₃ Al₆(Si₆O₁₈)(BO₃)₃(OH)₃O
Availability: Sold
Size: 4 x 2.5 x 1 cm - Miniature

Lucchesiite is a rare tourmaline found in only two localities on Earth. On this specimen it is all the vitreous black.

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

Makatite

#65528

$250.00 - Available
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Details
Data
Provenance
Resources

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.