Since the diamond engagement ring wasn't popularized until the 20th century, what were common pre-20th century engagement rings like?

by OrPerhaps

What were some of the more popular ring styles before the diamond became the standard? Were they largely gem-free?

Chewiemuse

In the early and late 1700's the Clauda Ring was considered an engagement ring in Irish culture, it also works as a friendship and promise ring, even today it's still used for that purpose