What is the difference between mantle and mantle?

Could you please clarify for me the distinction between 'mantle' and 'mantle'? As I understand, both terms seem to have something to do with covering or wrapping, but I'm not quite sure how they differ in their meanings and usage. In the context of various literary works or everyday conversations, how would one know when to use 'mantle' and when to opt for 'mantle'? Is there a specific nuance or context where each term is more appropriately applied? Your explanation would greatly assist me in clarifying this apparently subtle but significant distinction.