Recently Released Special Editions

Hide Solds

Langban Rare Minerals, Sweden

Friday, 28 March 2014 05:00 PM

Langban is one of the richest mineral deposits on Earth. We'll throw out many, many varieties of rare minerals.

SOLD

Swedenborgite

#PD38580

Details
Data
Provenance
Resources

Locality: Långban, Filipstad, Värmland, Sweden
Formula: NaBe₄Sb⁵⁺O₇
Availability: Sold
Size: 6 x 5 x 5 cm - Sm Cabinet
Special Info: Type Locality

Admittedly, this is not the best Swedenborgite I have seen. In fact, I'm not even convinced it is Swedenborgite. It contains three or four blue fluorecent crystals less than 1mm in size and nicely hidden to the naked eye in the matrix. The best crystal is a colorless somewhat prismatic crystal shown in the photos, if you can see it. It is a very rare beryllium mineral first found at Langban, If it is Swedenborgite, this is a nice price.

Swedenborgite

Formula: NaBe₄Sb⁵⁺O₇
Crystal System: Hexagonal
Cleavage: Distinct, None, None
Luster: Vitreous (Glassy)
Color: brownish yellow, colorless, honey yellow, light yellow
Streak: white
Class: Hexagonal - Dihexagonal Pyramidal
Fracture: Sub Conchoidal
Hardness: 8

Collection: Phillips Collection
Special Info: Type Locality

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

SOLD

Trimerite

in Hematite - #PD38588

Details
Data
Provenance
Resources

Locality: Långban, Filipstad, Värmland, Sweden
Formula: CaMn²⁺₂(BeSiO₄)₃
Availability: Sold
Size: 5 x 4 x 4 cm - Miniature
Tagged: beryllium

An incredible specimen of this rare beryllium mineral. The area in which the Trimerite occurs is approximately 9x5mm. There are two excellent crystals. The crystal on the left is a light pink color, very lustrous and looks twinned showing a complete pseudohexagonal form. It is 1.5mm wide. The other is larger and is about 3.5 to 4mm. It is partial but shows half the crystal and is a darker pink. These two crystals are surrounded by pink, glassy trimerite. Granular Hematite matrix. See prov. tab for older labels. Possible Blixite also.