Mosandrite is a rare-earth element (REE)-bearing silicate with the formula [([?
38 ct faceted mosandrite (Figure 7) of brown-orange colour was investigated by standard gemmological methods.
In the same year the Swedish mineralogist and geologist Axel Erdmann (1814-1869) also discovered lanthanum, in a Norwegian mineral which he named mosandrite
in honor of Mosander's discovery (Lundgren, 1987).
Dr Ulrich Henn (German Gemmological Association, Idar-Oberstein) reported the properties of some rare gem materials: wurtzite from Merelani, Tanzania; mosandrite
from the Kola Peninsula, Russia (see Gem Note on pp.
The current view (Fleischer and Mandarino, 1995) is that rinkite is a valid species, and mosandrite is an altered variety of rinkite.
1989) Nacareniobsite-(Ce), a new mineral species from the Ilimaussaq alkaline complex, South Greenland, and its relation to mosandrite and the rinkite series.