Engagement ring, wedding band, crucifix, class ring. Certain jewelry carries symbolism: what others can be added to this list? ~

Colossians 1:15 Who is the image of the invisible God, the firstborn of every creature:

The word 'image' is Greek 'ikon' which is the image on a signet ring. That is what they used to sign checks and proclamations and stuff. It's like a computer: the icon is not the program, but when you click the icon you get all the power of the program.

Friendship bracelets
Masonic rings
Medical bracelets
Bling jewelry

Championship rings
Sorority and Fraternity pins
Lapel pins of many types that indicate membership or association
Service jewelry such as from corporate employers for service anniversaries

none that i know of