153 



YTTRO-CERITE. 



The occurence of this very rare mineral in the limestone of Orange 

 county, N. Y., was first noticed by Mr. Alger. 



It presents all the characters of the mineral from Finbo, in Sweden, 

 and cannot be distinguished from it in hand specimens. (Memoirs of 

 the Boston Nat. Hist. Soc. ii, p. 88.) It occurs in grains of a beautiful 

 purple color, resembling fluor spar for which it has heretofore passed 

 among the New- York mineralogists. I have specimens from Amity, 

 ki Orange county, associated with talc and other minerals in white 

 limestone. 



