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  1. Mountain White

    ... very fine grained feldspar s ( albite twinning ), and sphene . Other low birefringence minerals may also be present in these ... s (muscovite, phlogopite and others?), sillimanite, opaques, sphene, and possibly brucite and other low birefringence minerals. The most ...

    Ed FitzGerald - 2015-09-05

  2. Crystal Stratus

    ... amphibole s, sillimanite, vesuvianite ?, opaques, sphene , and possibly brucite as well as other unidentified low birefringence ... muscovite?), sillimanite, vesuvianite?, opaques, sphene, and possibly brucite as well as other unidentified low birefringent ...

    Ed FitzGerald - 2015-09-05

  3. Montclair

    ... , phlogopite and others?), sillimanite, opaques, sphene , and unidentified low birefringence minerals (brucite?). The most ... include micas (muscovite, phlogopite?), sillimanite, sphene, opaques, and low birefringence minerals that cannot be conclusively ...

    Ed FitzGerald - 2015-09-05

  4. Greene County

    ... , which is common but less than 5 percent of slide area. Sphene is also readily identifiable in characteristic euhedral diamond ...

    Raven Mueller - 2015-08-12

  5. Nor-Carla Bluestone

    ... sericite , and chlorite ; epidote, pyrrhotite, sphene -leucoxene,and biotite occur as minor accessories. Here, the ...

    Raven Mueller - 2015-08-12