A
- Abalone
- African bloodstone
- African turquoise
- Agate
- Agate geode
- Turritella Agate
- Red Agate
- Pink Botswana Agate
- Pink Flower Agate
- Persian Agate
- Mexican Agate
- Oriental Agate
- Alabandite
- Alexandrite
- Almandine
- Alum
- Amazonite
- Amber
- Amber agate
- Dendritic Agate
- Amethyst
- Rainbow Amethyst
- Amethyst-Chevron
- Ametrine
- Anatase
- Angelite
- Apache tears
- Apophyllite
- Apricot Agate
- Aqua Marine
- Aragonite
- Red Aragonite
- Pink Aragonite
- Green Aragonite
- Arginine
- Astrophyllite
- Auralite 23
- Aventurine
- Red Aventurine
- Green Aventrine
- Orange Aventurine
- Green Flower Agate
- Moss Agate
- Azurite
- Banded Agate
- Fire Agate
- Flower Agate
- Grape Agate
- Blue Agate
- Blue Aragonite
- Blue Aventurine
- Blue lace agate
- Botswana agate
- Agate-Crazy Lace