Yep, I believe it is based on the mystical metal Orichalcum (not sure why they didn’t just call it that if that’s the case). They live in jungle environments and enjoy making lairs in ancient temples and old ruins where they spend much of their time trying to renovate and restore them to there former glory (with some minor alterations to accommodate their physiology). They love collecting ancient trinkets and relics from past civilizations for their hoards, and include the temples and ruins they renovate as part of said hoard.
Edit: Just realized this was explained earlier in the thread, so sorry for the redundancy.