16 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. CO 



In color the monazite is commonly resinous golden yellow to amber 

 or orano-e brown. Only a few crystals were found which had what 

 could accurately be described as a greenish tinge, the associated 



10 



V 



12 



Figs. 10-14. — Cbystals of monazite. 



JI 



greenish grains usually being either augite, titanite, or olivine. A 

 few gi-een and a few perfectly colorless transparent monazite 

 crystals were seen in the samarskite-columbite concentrate from 



