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1. Abelsonite
2. Abenakiite-(Ce)
3. Abernathyite
4. Abhurite
5. Abswurmbachite
6. Acetamide
7. Actinolite
8. Acuminite
9. Adamite
10. Adamsite-(Y)
11. Adelite
12. Admontite
13. Aegirine
14. Aenigmatite
15. Aerinite
16. Aerugite
17. Aeschynite-(Ce)
18. Aeschynite-(Nd)
19. Aeschynite-(Y)
20. Aetites
21. Afghanite
22. Afwillite
23. Agardite
24. Agrellite
25. Agrinierite
26. Aguilarite
27. Aheylite
28. Ahlfeldite
29. Aikinite
30. Ajoite
31. Akaganéite
32. Akatoreite
33. Akdalaite
34. Åkermanite
35. Aksaite
36. Alabandite
37. Alamosite
38. Alarsite
39. Albite
40. Alforsite
41. Algodonite
42. Aliettite
43. Allanite
44. Alloclasite
45. Allophane
46. Almandine
47. Alstonite
48. Altaite
49. Aluminite
50. Aluminium
51. Alunite
52. Alunogen
53. Amblygonite
54. Ameghinite
55. Amphibole (mineral group)
56. Analcite
57. Anatase
58. Andalusite
59. Andesine
60. Andradite
61. Anglesite
62. Anhydrite
63. Ankerite
64. Annabergite
65. Anorthite
66. Anorthoclase
67. Anthophyllite
68. Antigorite
69. Antimony
70. Antitaenite
71. Antlerite
72. Apatite (mineral group)
73. Apophyllite
74. Aragonite
75. Archerite
76. Arctite
77. Arcubisite
78. Arfvedsonite
79. Argentite
80. Argutite
81. Armalcolite
82. Arsenic
83. Arsenopyrite
84. Arthurite
85. Artinite
86. Artroeite
87. Asisite
88. Astrophyllite
89. Atacamite
90. Atheneite
91. Aubertite
92. Augelite
93. Augite
94. Aurichalcite
95. Auricupride
96. Aurostibite
97. Autunite
98. Axinite (mineral group)
99. Azurite