The second or middle finger, which, upraised, is used as the ultimate gesture of insult in the United States, has long been thought to be an unlucky finger on which to wear rings on.
Once, rings were usually worn on the third finger, because it was thought to contain a nerve that went directly to the heart. Betrothal rings are traditionally worn on this finger.
NECKLACES:
The necklace is simply a large ring worn around the neck. Its powers and uses are much the same as those of rings. Because necklaces are often worn near the heart, they can be used to work on the emotions, or to attract or strengthen love.
In contemporary Wicca, women often wear necklaces of stones to represent reincarnation and the Goddess.
Wearing a necklace of sotnes increases their ebergies because you are surrounding yourself (binding yourself) with their powers. Thus, the necklace is much more powerful than any one stone used seperately.
EARRINGS:
Earrings were once worn to guard the ears from negativity and disease. Later they became a symbol of slavery, for slaves wore earrings marking their status.
Earrings are rings that are worn in the ears. Piercing the lobes to allow the wearing of earrings is an ancient practice.
Most parts of the body have been pierced for various magical and religious reasons throughout the ages. Ears may have been amung the first, along with the nose which is still pierced in India for protective as well as cosmetic reasons.
Folklore still surrounds this practice. Pierced earrings in general are often recommended to strengthen weak eyes-if set in emeralds, they are particularly effective. Gold earrings are often worn by those wighing to cure headaches, though some say to wear one gold earring and one silver for this purpose.
Go to my referances and it is under The Magic of Jewelry.