Some would call this a faux moon glow stone. I believe it is a thermal plastic they used in the late 50's early 60's. It is a deep red and will compliment any French cuff shirt or blouse. Overall size of cufflink is 5/8" x 7/8". Both men and women could wear this set. It is in very good condition with no maker's mark.
Jewelry Treasures From The Past
When you buy vintage you are buying classic memories!