Mineral: Thorianite
Locality: Betroka District, Anosy Region, Madagascar
Dimensions: 8 x 5.5 x 4 cm / main crystal: 2.6 cm

Description: Mass: 366 g MIM number:1974 Cluster of well-formed black cubic crystals with some crystal pairs showing interpenetration twins. It is uncommon to find this species, which generally produces isolated cubes in groups of well-formed crystals. Photographer: AINU / Augustin de Valence

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