* It's a misspelling: Perhaps you meant a different kind of stone. Could you double-check the spelling?
* It's a local name: The term might be specific to a particular region or community. If you can provide more context about where you encountered it, that might help.
* It's a fictional term: The name might be from a book, movie, or other work of fiction.
Please provide more information so I can help you find the correct English term.