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