A

Acanthite

Achroite

Actinolite

Adamite

Aegirine

Aegirine-Augite

Aenigmatite

Aeschynite-(Y)

Afghanite

Afwillite

Agardite Group

Ajoite

Akaganeite

Åkermanite

Alacránite

Albite

Allanite Group

Allanpringite

Alicewilsonite-(Y)

Allophane

Almandine (Garnet Supergroup)

Alstonite

Aluminium-bearing adamite

Alumochalcosiderite

Alumohydrocalcite

Alunite

Amesite

Amphibole Supergroup

Analcime

Anapaite

Anatase

Ancylite-(Ce)

Andalusite

Andersonite

Andradite (Garnet Group)

Angastonite

Anglesite

Ankerite ?

Annabergite

Annite

Anorthite

Antlerite

Antozonite (Fluorite)

Apatite

Apjohnite

Apophyllite

Aquamarine (Beryl Group)

Aragonite

Arfvedsonite

Armalcolite

Arsenic-bearing Vanadinite (formerly called Endlichite)

Arsendescloizite

Arseniosiderite

Arsenocrandallite

Arsenogorceixite

Arsenogoyazite

Arsenolite

Arsenopyrite

Arsentsumebite

Arthurite

Artinite

Artroeite

Asbecasite

Astrophyllite

Atacamite

Atelestite

Atencioite

Augite (Clinopyroxene Subgroup)

Auriacusite

Aurichalcite

Austinite

Austinite (copper bearing)

Autunite

Axinite

Azoproite

Azurite