This list has been divided into four separate webpages:

There are also separate pages for signet rings and inscribed rings (including posy rings, memento mori rings, etc.)

Jewelers who create period-style rings can be found here. Additional information can be found at medieval-rings.com.

Medieval Jewellery in Europe 1100-1500 Toward an Art History of Medieval Rings: A Private Collection Dress Accessories, c. 1150- c. 1450 Historic Rings: Four Thousand Years of Craftsmanship Theophilus, On Divers Arts

Mediaeval European Jewellery With a Catalogue of the Collection in the Victoria & Albert Museum