The bulk update request #5745 is pending approval.
create alias gold_earring (0) -> gold_ear_ring (1207)
create implication gold_ear_ring (1207) -> ear_ring (104274)
create implication gold_ear_ring (1207) -> gold_(metal) (27731)
Reason: While gold_earring has more posts, the more popular general ear_ring tag contains an underscore. And earring is aliased to ear_ring, so should gold_earring be aliased to gold_ear_ring for consistency, and implicated to ear_ring and gold_(metal) for obvious reasons.
I would also say that ear ring (or more specifically, the base piercing tag) should imply jewelry, but it currently does not, and I'd rather not have the discussion here that this should imply gold jewelry, even though I think it should. That discussion is out of scope for this request.
Updated