Ring

The Ring Slot refers to one of the 19 Equipment Slots on the Paperdoll. Though an available equipment slot for quite some time, it was not until 2003 that rings spawned with static modifications or mods. Furthermore, tinkers have only been able to craft magic rings, bracelets, and neck wear since 2005.

Artifact Rings

Burning Amber
Crystalline Ring
Ring of the Elements
Ring of the Vile

Tinkering-Crafted Rings

Not including the ore variations, tinkers can create 5 magic rings and 9 different decorative rings:

Magic Crafted Rings

Ecru Citrine Ring
Blue Diamond Ring
Perfect Emerald Ring
Turquoise Ring
Essence of Battle

Decorative Rings

These rings contain no mods and appear alike, save for the tooltip.

Reward Rings

Ring of the Savant
Vesper Museum Collection
An Old Ring
A quest item

Other Rings

Djinni's Ring -- An Event Moderator item.
Ring of Valor -- A named ring that is Seer reward in Spiritwood event.

Crafting

Skill required:

65.0 Tinkering

Components:

3 Ingots