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  1. Royal Danby

    ... in calcite/dolomite crystals is near ubiquitous. Most twin lamellae follow rhomb edges. Grain boundaries are sutured. Non carbonate ... Most are likely quartz, but several instances with albite or Carlsbad twinning were noted. Other accessory minerals are ...

    Raven Mueller - 2015-09-05

  2. Crystal Stratus

    ... or straight with a lesser amount of sutured boundaries. Twin lamellae in carbonates are common. Non-carbonate accessory minerals minimally include quartz , feldspar s ( albite twinning ), mica s ( phlogopite , muscovite ?), amphibole s, ...

    Ed FitzGerald - 2015-09-05

  3. Appalacian Green

    ... or straight with a lesser amount of sutured boundaries. Twin lamellae in carbonates are common. Non-carbonate accessory minerals minimally include quartz , feldspar ( albite twinning ) amphibole s (richterite, tremolite?), mica s ( ...

    Ed FitzGerald - 2015-09-05

  4. Montclair

    ... or straight with a lesser amount of sutured boundaries. Twin lamellae in carbonates are common. Non-carbonate accessory minerals minimally include quartz, feldspar ( albite twinning ), mica s ( muscovite , phlogopite and others?), ...

    Ed FitzGerald - 2015-09-05

  5. Mountain White

    ... aggregates with quartz, very fine grained feldspar s ( albite twinning ), and sphene . Other low birefringence minerals may also ... or straight with a lesser amount of sutured boundaries. Twin lamellae in carbonates are common. Non-carbonate accessory minerals ...

    Ed FitzGerald - 2015-09-05