This vintage gold service ring, possibly a vintage 14k yellow gold plated US Army service ring.
It features a large, faceted red stone, which may be a ruby or Garnet
The ring is a type of commemorative jewelry, symbolizing school pride, achievement, or affiliation with an organization like the military.
Class rings have a long tradition dating back to 1835 at the United States Military Academy at West Point.
They are often customized with specific emblems, dates, and text relating to the wearer's class or institution.