Materials
- Anorthosite gneiss2 objects
- Antler6 objects
- Antler (material)1,025 objects
- Antler (material) ("staghorn")1 objects
- Antler (material) (deer)1 objects
- Argillite10 objects
- Argillite (argellite)1 objects
- Arrow weed ("made of arrowweed")1 objects
- Asbestos12 objects
- Ash (wood)2 objects
- Aspen (wood)1 objects
- Asphalt (bituminous material)19 objects
- Asphaltum1 objects
- Avoderi wood1 objects
- Babul1 objects
- Badger fur3 objects
- Bakelite™8 objects
- Baleen52 objects
- Baleen (baleen; pigment, white and red)1 objects
- Balsa (wood)18 objects