Mianningite, Rutile
Dzhigda U ore occurrence, Dambuki ore cluster, Amur Oblast, Russia
Lustrous sections of tabular crystals of black romanite in greenish amphibolite matrix. Associating mineral is redish-brown granular secondary rutile, replacing romanite grains. It is more visible on cut back side of the specimen. Its size is 7x7x3 cm and radioactivity 2625 μR/h. Collected by L.I. Larichev in 1980. Pavel M. Kartashov collection ...
© Pavel M. Kartashov collection & photo