Materials
- Agate (chalcedony) (agate type stone)1 objects
- Agate (chalcedony) (mineral: moss agate)1 objects
- Agate (chalcedony) (striped agate (onyx type))1 objects
- Agave1 objects
- Alabaster (mineral)18 objects
- Alabaster (mineral) (?)2 objects
- Alabaster (mineral) (alabastoid)1 objects
- Albumen paper156 objects
- Alder (wood)1 objects
- Alder root92 objects
- Alizarin (natural colorant)8 objects
- Alpaca (wool)5 objects
- Aluminum (metal)73 objects
- Amazonite1 objects
- Amber1 objects
- Amber (fossil resin)24 objects
- Amethyst97 objects
- Amphibolite4 objects
- Andesite11 objects
- Andesite (pinkish)1 objects