Purple and Clear Stone Yellow Gold Ring Inscription 18KGF?

Purple and Clear Stones or Possibly Glass or something else. Shiny Costume Ring in Gold colored band. I believe the inscription inside the ring says 18KGF but I’m not positive as the inscription is worn. It is around a Size 6 and possibly a little bigger or smaller. It is a fun Ring! It shows all over wear as I enjoyed wearing this ring. I find it tarnishes/discolors easily so it needs frequent cleaning/ polishing. Because of the fast tarnishing I am reducing the price greatly and my new Price is my lowest and is firm. Measurements are approximate and colors may be off because of lighting and monitors used to view. Since it isn’t new and is used there are imperfections.