How to spell FIRMERITE correctly?

If you meant to type "firmerite" but made a misspelling, here are a few correct suggestions. It's possible that you were trying to type "firmament", which refers to the heavens or the sky. Another option could be "firelighter", which is a product used to help start fires. Lastly, if you intended to refer to a specific mineral, "fluorite" could be a correct spelling.