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