There are many remedies for arthritis, using lots of different methods of healing! Healing with energy, healing with herbs.. I prefer to go for the latter. Try to stay away from nightshades such as tomato, potato, pepper, etc.
Personally, if you are using crystals, I would use clear quartz.
Take a 'Cod Liver Oil' capsule every day to loosen up them joints! It really helps.
A simple Google search can provide you with lots of info. If you are interested in healing via energy, message me. :)