Eudialyte replacement

Plane Polarized microscope image of a eudialyte nepheline syenite, showing complete pseudomorphic replacement of the main ore mineral eudialyte.

Bright green: alkali pyroxene, Black to green: alkali amphibole, White: alkali feldspar and nepheline , Blue-purples: catapleiite, a Zr-rich replacement product after eudialyte

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