What's the plural form of zaccagnaite? Here's the word you're looking for.
Answer
The noun zaccagnaite can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be zaccagnaite.
However, in more specific contexts, the plural form can also be zaccagnaites e.g. in reference to various types of zaccagnaites
or a collection of zaccagnaites.