Jewellery
Jewellery is a category of equipment that consists of rings and amulets. They are always magical, but not necessarily in a beneficial way.
Most species can equip one amulet and two rings, although octopodes are able to wear eight rings at a time, and some bad forms restrict your jewellery options. Rings and amulets are equipped with the P key ("putting"), and removed with the R key. You can't put on a ring if you're wearing a cursed pair of gloves/gauntlets or if you are berserk. Berserking will also prevent you from changing amulets.
One of the most important differences between jewellery and armour is that jewellery can be put on or removed extremely quickly. Swapping even light body armour in the middle of a battle will leave you unable to act for a dangerous amount of time. Swapping rings or amulets, however, takes no longer than quaffing a potion or reading a scroll. As such, jewellery swapping is an easy way to quickly give yourself the resistances you need in the middle of a battle.
Curses
Unidentified rings have a 2% chance of being cursed, with the following exceptions:
- Ring of slaying - 21%
- Ring of protection/evasion/strength/dexterity/intelligence - 22% (usually with negative attributes)
- Ring of hunger/teleportation - 100%
Unidentified amulets have a 2% chance of being cursed, regardless of their usefulness.