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| A¨erinite | Abelsonite | Abenakiite |
| Abhurite | Abkhazite | Abrazite |
| Abriachanite | Absite | Abstracts |
| Abswurmbachite | Abukumalite | Acadialite |
| Acetamide | Achiardite | Achrematite |
| Achromaite | Acmite | Actinolite |
| Actinolitic hornblende | Actinote | Actynolin |
| Actynolite | Acuminite | Adamsite of Shepard |
| Adamsite-Y | Adelpholite | Adipite |
| Admontite | Aedelforsite | Aedelite of Kirwan |
| Aedilite | Aegirine | Aegirine-augite |
| Aegirine-hedenbergite | Aegirite | Aegyrite |
| Aenigmatite | Aerugite | Aeschynite |
| Aeschynite-Nd | Aeschynite-Y | Afghanite |
| Agalite | Agalmatolite | Agardite-La |
| Agardite-Y | Aglaite | Agrellite |
| Agrinierite | Aheylite | Akagan´eite |
| Akatoreite | Akdalaite | Akhtenskite |
| Akimotoite | Aksaite | Aktinolitischer tschermakite |
| Alacranite | Alalite | Alarsite |
| Alaskaite | Alazanite | Albrechtschraufite |
| Albrittonite | Aldermanite | Aldzhanite |
| Aleksite | Alforsite | Aliettite |
| Alkali augite | Alkali-femaghastingsite | Alkali-ferrohastingsite |
| Alkali-hastingsite | Allabogdanite | Allactite |
| Allanite | Allanite-La | Allanite-Y |
| Allargentum | Allcharite | Allemontite |
| Allevardite | Allopalladium | Alluaivite |
| Alluaudite | Almarudite | Almbosite |
| Almeriite | Alsakharovite-Zn | Althausite |
| Althupite | Altisite | Altmarkite |
| Aluminium | Aluminobarroisite | Aluminobetafite |
| Aluminoceladonite | Alumino-ferrobarroisite | Alumino-ferro-hornblende |
| Alumino-ferrotschermakite |
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