Actinolite, Adamite, Adamsite, Afghanite, Agate, Alabandite, Albite, Alexandrite, Allactite, Allanpringite, Alleghanyite, Almandine, Altaite, Alunite, Amesite, Amethyst, Ametrine, Analcime, Anatase, Andalusite, Andradite, Angelsite, Anhydrite, Annabergite, Anorthite, Anorthoclase, Antimony, Apatite, Apophyllit, Aquamarine, Arfvedsonite, Argentite, Argyrodite, Arsenolite, Arsenopyrite, Asisite, Atacamite, Aurichalcite, Auricupride, Autunite, Aventurine, Axinite, Azurite