This small circular pin has a red glass stone in the top. The overall size is approximately 1 1/8 inches.  I believe it would date circa the 1960s.  The metal is gold colored, but there are no markings on it that I could find.  There is wear to the metal, and it could use a good cleaning, but I am not a jewelry person and did not want to cause any damage so will leave that to the new owner.  To me it has an Edwardian Style look to it, but I am not sure of the exact age, it has been in my jewelry box for around 15 years.  It would make a great scarf pin, or wear on a coat, or even pin it on a backpack.