Reported occurrences of andalusite in pegmatite are reviewed and two new occurrences are described in which andalusite, corundum, microcline, and quartz are found in giant intergrowths, in metamorphic terrains. The geological setting is discussed and suggestions are offered as to the genesis of the occurrences. Thermal metamorphism of aluminous sediments and metamorphic differentiation are thought to account for the features of the two occurrences.

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