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

Alum-K

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

Arsenoflorencite-(Ce)

Arsenogorceixite

Arsenogoyazite

Arsenolite

Arsenopyrite

Arsentsumebite

Arthurite

Artinite

Artroeite

Asbecasite

Asisite

Astrophyllite

Atacamite

Atelestite

Atencioite

Augite (Clinopyroxene Subgroup)

Auriacusite

Aurichalcite

Austinite

Austinite (copper bearing)

Autunite

Axinite

Azoproite

Azurite