EUDIALYTE Na4(Ca,Ce)2(Fe,Mn,Y)ZrSi8O22(OH,Cl)2 Hexagonal

Description: Eudialyte is a rare mineral found in pegmatitic low-silica igneous rocks.

MARATHON COUNTY: Pale yellow anhedral grains of eudialyte with locally pinkish cores were found in a gneissic syenite in the NE NE Sec. 27 T.29N R.6E, near Stettin. Associated minerals were nepheline, zircon, microperthite and fluorite (Geisse, 1951; Stobbe and Murray, 1956).

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