Braunite Långban, Filipstad Municipality, Värmland County, Sweden Dimensions: 3.8 × 3.5 × 2.3 cm Provenance: Original vintage collection label, catalog no. 135, included with specimen.
A classic Braunite specimen from the historic Långban mineral locality in Sweden, featuring abundant fine-grained, dark steel-gray to black mineralization distributed throughout a contrasting white to translucent crystalline matrix. The Braunite occurs as densely concentrated granular aggregates and numerous small, angular crystals, creating a distinctive black-and-white mottled appearance. Subtle metallic to submetallic reflections across the darker surfaces contrast beautifully with the sparkling, glassy texture of the lighter matrix.
Braunite is a manganese silicate oxide mineral with the chemical formula Mn²⁺Mn³⁺₆SiO₁₂. It commonly occurs in metamorphosed manganese deposits and is recognized for its dark coloration and characteristic tetragonal crystal structure. Långban, located in Värmland County, Sweden, is one of the world's most celebrated mineral localities, renowned for its extraordinary mineral diversity and complex manganese-rich geology. The district has produced numerous rare manganese minerals, making specimens from this historic locality especially appealing to collectors of classic European minerals.
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