A finger ring: a circular band worn as a type of ornamental jewellery around the finger; it is the most common current meaning of the word ring. Other types of metal rings worn as ornaments are also called rings, such as earrings, arm rings, toe rings and neck rings.
Rings can be of almost any material: metal, plastic, wood, bone, glass, gemstone to name a few. They may be set with a stone of some sort, which is often a precious or semi-precious gemstone such as diamond, ruby, sapphire or emerald, but can also be of almost any material.
The custom of giving and receiving finger rings dates back over approximately 6,000 years. Tracing exact history is difficult.