Mineral: Pyrolusite
Locality: Gremmelsbach (Triberg im Schwarzwald), Schwarzwald-Baar-Kreis, Freiburg, Baden-Württemberg, Germany
Dimensions: 24 x 16 x 13 cm / main crystal: 16.0 cm.

Description: Mass: 2200 g MIM number:2177 Interpenetrated sprays of black, very shiny acicular crystals. Pyrolusite is an abundant industrial mineral which very rarely gives samples as aesthetic as this one with clearly defined crystals. Photographer: FMI / James Elliot

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