Every one wore rings, from lower class to nobility. Rings could be made of iron, copper, silver or gold. The material of the ring often denoted the wearer's social class. Faceted stones do not appear regularly until the 14th century. Along with a little more skin, we begin to see a little more jewelry.
Necklaces begin to make an appearance, but mostly as collars.
A collar necklace will most often be made of chains or enamelled jewels that sit low on the shoulders. Both men and women wore them, though the men's tended to be chains of state more often than not. Later on, collars become elaborate affairs with complicated twists and beads. Still no earrings yet, but Brooches and Rings have not disappeared. However, avoid facted stones in anything.