First occurrence of Dissakisite-(Ce) and Jamborite in New York
(12.01.12) Dissakisite-(Ce) -
Ca(Ce,REE)(Mg,Fe2+)(Al,Fe3+)2Si3O12(OH) - the magnesium analogue
of the more common allanite (Ce), was found in a specimen from
the Henry Rudy Farm, in Orange County. It occurs as millimeter-
size pink crystals associated with chondrodite, spinel, and
phlogopite in marble (Franklin Marble). To our knowledge, this
is the first reported occurrence of this mineral in North
America. Jamborite, (Ni2+Ni3+Co, Fe)(OH)2(OH,S,H2O), was found
in a specimen from Antwerp, Jefferson County. It occurs as green
sub millimeter-size crystals in a cavity in quartz. This is the
third occurrence of this mineral in the USA.