Inside of band has a 925 marking It is gold toned so likely gold plated Sterling silver. The ring is in pretty good condition and no major flaws that I can see except for some wear. The stones do not appear loose in the setting, just a little dirty. My diamond selector ii does increase with the reddish pinky magenta stone so maybe it’s ruby? See last couple of photos for what I mean See photos for details and measurements Approx size 6