Umptekite (Q43753)

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Revision as of 13:40, 12 May 2023 by Sky (talk | contribs) (‎Changed an Item: Moved Mindat rock identifier to instance of claim as qualifier)
A variety of alkali-feldspar-syenite consisting of microperthite, arfvedsonite, aegirine and, sometimes, nepheline
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English
Umptekite
A variety of alkali-feldspar-syenite consisting of microperthite, arfvedsonite, aegirine and, sometimes, nepheline

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