Vermandere-Verheyden / Strange Freak
Nerd wars! In reading about the cycloid, I learned it's "been called 'The Helen of Geometers' as it caused frequent quarrels among 17th-century mathematicians." Coincidentally, these "Cycloides" rings made me think of cyclopses, so I guess it's just a Greek mythology kind of day.
All rings above by the Vermandere half of married Belgian duo Vermandere-Verheyden (Daisy Verheyden & Peter Vermandere).
Even more jewellery: