Thx for looking,and I will have a buddy of mines test it.He just tested my last ring ,but was costume jewelry.Still was a nice looking ring though.Lighter looks older, at lest before the start of the anti smoking campaign.
If you had a gold test kit you can test it. It was probably part of an earring or pendant and the other piece that has the karat marking on it broke off.
Congrats nice finds, hope it's gold!