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Nepheline Syenite
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Collection |
John Betts - Fine Minerals |
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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. |
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Locality |
1 mile NE of Etta Mine, Keystone District, Pennington County, South Dakota |
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Dimensions |
7 x 7 x 3 cm. |
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Specimen Grade |
A |
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Photograph |
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