Orange kyanite from Tanzania
George R. Rossman
Division of Geological
and Planetary Sciences
California Institute of Technology
from Nani, Loliondo, Tanzania and from Mautia Hill, Tanzania, are described.
Their colors range from yellow-orange to orange.
Kyanite from Mautia Hill, Tanzania, that contains Mn3+
Optical spectrum of darker-orange kyanite from Nani, Lolioindo, Tanzania
Gems & Gemology 45,