- Bariandite in Quartzite
- Miniature, 5.0 x 5.0 x 3.0 cm
- Mounana Mine, Franceville, Haut-Ogooue Province, Gabon
- Ex. Josef Vajdak
Dark blue-black, bladed to prismatic, sub-millimeter, radiating aggregates of bariandite in voids among quartz grains. Predominantly as a matted agglomeration forming the matrix of medium-grained quartz sandstone. Associated with micro crystals of a yellow orange unknown. Named in honor of Pierre Bariand, Curator of Mineralogy, Pierre and Marie Curie's University, Paris, France.