Agate (noun)

1. A type of chalcedony, a mineral that is a variety of quartz and is characterized by its multicolored bands or patterns.
2. A type of decorative stone that is used in jewelry, ornaments, and other decorative items.

Origin:

From the greek word "áchates" which is the name of a river in sicily where agates were found.

Examples:

1. This agate is one of the most beautiful examples of the mineral I've ever seen.
2. The pendant was made of agate and it was very valuable.
3. The agate on the ring was of a deep red color with white bands.
4. The agate paperweight on his desk was a gift from his wife.
5. The agate beads on the necklace were smooth and had a nice weight to them.