Nepheline Syenite
Collection
John Betts - Fine Minerals
Description
Specimen of Nepheline syenite containing a mixture of several minerals.
Nalle suggested the presence of Riebeckite, Nepheline, and Cancrinite, etc.
Ex. Peter B. Nalle (1923-2010) collection #334; collected 1946.
Locality
1 mile NE of Etta Mine, Keystone District, Pennington County, South Dakota
Close
