A

Acanthite


Achroite


Actinolite


Adamite


Aegirine


Aegirine-Augite


Aeschynite


Afwillite


Agardite


Ajoite


Akaganeite


Åkermanite


Alalite


Allanite-(Ce)


Allanpringite


Allophane


Almandine (Garnet Supergroup)


Alstonite


Alumochalcosiderite


Alumohydrocalcite


Amesite


Amphibole Supergroup


Analcime


Anatase


Andersonite


Andradite (Garnet Supergroup)


Anglesite


Ankerite ?


Annabergite


Anorthite


Antlerite


Antozonite (Fluorite)


Apatite


Apophyllite


Aquamarine (Beryl Group)


Aragonite


Arfvedsonite


Arsenic-bearing Vanadinite (formerly called Endlichite)


Arseniosiderite


Arsenogorceixite


Arsenogoyazite


Arsenopyrite


Artinite


Asbecasite


Astrophyllite


Atacamite


Atelestite


Atencioite


Augite (Clinopyroxene Subgroup)


Aurichalcite


Austinite


Autunite


Axinite


Azurite