The SI of DC.......

Smithsonian GeoGallery - Smithsonian Institution

geogallery.si.edu/

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Smithsonian Institution

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Abee; Acasta Gneiss; Actinolite; Adamite; Aegirine with orthoclase; Afghanite; Afghanite with calcite; African Gems; Agate; Ahumada; Albite (var. moonstone) ...

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