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