Circlet (noun)

A small ring or band, often worn as jewelry or as an ornament on a headdress.

Origin:

Middle english, from old english sircol "ring, circle".

Examples:

1. The queen wore a circlet of gold on her head.
2. The circlet was inset with precious stones.
3. The circlet was a symbol of her status.
4. I gave her a circlet of flowers for her hair.
5. The circlet was a delicate piece of jewelry.