Bhutan Natural Gnesis Stone

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Bhutan Natural Muscovite stone from Tsirang with Mica flakes.

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Bhutan Natural Gnesis Stone

Distinct bands of minerals of different colors and grain sizes characterize this metamorphic rock. In most gneisses, these groups are folded, although the folds may be too large to see in hand specimens. Gnesis is a medium to coarse-grained rock. Unlike schist, its foliation is well developed, but it has little or no tendency to split along planes.
Most gneisses contain quartz and feldspar, but neither mineral is necessary for a rock to be called gnesis.