The Amphora is an ancient type of pottery from Ancient Greece used to hold water, and created by pottery shards. They can be found in naturally spawning structures like temples, or in chests, alongside the volute and kylix, and there are several different coloration varieties that can be made. They are purely for decoration.
Broken Amphora
The broken amphora can be found in mod structures and is what you get when you craft several pottery shards together. It can be placed down. It is a large container-like object.
Restored Amphora
The restored amphora is what you get when you put a broken amphora into a archeology workbench and fuel it with several pottery shards. It can be placed down and it is much more detailed but still has no colour. It has static water inside of it.
Coloured Amphora
The coloured amphora is a coloured-in, placeable amphora that can be crafted from the restored amphora with dyes. It does not naturally spawn in any structures, and thus must be made by the player. There are three types of coloured amphora; the red figure Amphora, the porcelain amphora, and the black figure amphora.