Alnöite is a lamprophyre and is often considered part of the kimberlite family. it carries large phlogopite and pyroxene crystals set in a groundmass of smaller crystals of melilite, pyroxene, olivine, perovskite, apatite, calcite, nepheline and zircon.
See further details at:
Alnö:
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Alnöite:
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Prof. Troll:
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