What is the collective nouns of pottery?

There isn't a widely accepted, specific collective noun for pottery. Here are some options you could use, depending on the context:

General:

* Collection of pottery

* Set of pottery

* Assortment of pottery

* Array of pottery

More descriptive:

* Kiln of pottery (if referring to pottery fresh from the kiln)

* Display of pottery (if referring to a collection on display)

* Showcase of pottery (if referring to a selection of exceptional pieces)

* Inventory of pottery (if referring to a store's stock)

Ultimately, the best choice depends on the specific situation and what you want to emphasize.