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