"Onyx" would be a contender, because "valuable mineral", but (a) taken [though low traction, it seems], (b) too dark for Camelia's colorful theme.
"Edom" got a look, because it's got backwards pun-ability (critical!), and because Wikipedia says "If the account may be taken at face value, the kingship of Edom was, at least in early times, not hereditary, perhaps elective."
Or just rip a page out of 80s Larry's book and find a compelling 5 letter word ("Pearl [of great price]") and excise a single letter, leading to a unique new word.