My favorite Tiffany ring is my Tiffany setting engagement ring! One of the rings on my wish list right now is the Pearl Ring from the Ziegfeld Collection.
Super easy question.
Hands down it is my 1990's thick Atlas 18k yellow gold ring.
It's heavy yet easy to wear. Classic yet understated.
I wear it on my right hand and choose it over my Schlumberger sixteen stone rings most of the time!