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Adamite
Aegirine
Agrellite fluorescent (pink)
Albite
Albite (pink) on microcline
Albite peristerite (moonstone)
Albite with polysynthetic twinning
Allanite
Amazonite dark green (variety of microcline)
Amazonite pale green (feldspar)
Amblygonite
Amphibole (hornblende)
Analcime
Andalusite (chiastolite)
Anglesite on galena
Anhydrite
Ankerite
Annabergite
Annabergite on nickeline
Antimony