noun
finger ring
A ring worn on the finger. The cross-reference to 指輪 suggests it is a synonym or older term for a finger ring.
See also: 指輪
彼女は美しい指金をはめていた。
She was wearing a beautiful ring.
noun
metal thimble
A metal thimble used in sewing, as indicated by the cross-reference to 指貫 (ゆびぬき).
See also: 指貫 (ゆびぬき)
裁縫のときは指金をはめて針を押す。
When sewing, I put on a metal thimble to push the needle.
noun
finger-constricting ring (archaic)
Archaic use: a ring worn to constrict a finger, believed to make it slender and beautiful. Not in modern use.
昔の女性は指を細く見せるために指金を使ったという。
It is said that women in the past used finger-constricting rings to make their fingers look slender.