Umptekite (Q43753)

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Revision as of 18:21, 21 April 2023 by Sky (talk | contribs) (‎Cleared an Item: Added to primary parent rock class as subclass)
A variety of alkali-feldspar-syenite consisting of microperthite, arfvedsonite, aegirine and, sometimes, nepheline
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Umptekite
A variety of alkali-feldspar-syenite consisting of microperthite, arfvedsonite, aegirine and, sometimes, nepheline

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