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  1. Crystal Stratus

    ... , muscovite ?), amphibole s, sillimanite, vesuvianite ?, opaques, sphene , and possibly brucite as well as other ... twinning), micas (phlogopite, muscovite?), sillimanite, vesuvianite?, opaques, sphene, and possibly brucite as well as other ... this aggregate, except the trace amounts of what is likely vesuvianite, which appears only as individual crystals. Platy mica minerals are ...

    Ed FitzGerald - 2015-09-05

  2. Eureka

    ... apatite seems a likely candidate but others such as vesuvianite are possible. Other low birefringent unidentified minerals are ...

    Ed FitzGerald - 2015-09-05