Rhinestone (noun)

1. A flat, high-quality imitation diamond, used as a decorative stone in jewelry, clothing, and other accessories.
2. A glass or plastic rhinestone used to imitate a diamond.

Origin:

The word rhinestone is derived from the german word 'rhine' which is the name of a river that runs through europe, and 'stein' which means stone. it was originally used to describe quartz pebbles that were found along the rhine river, and then came to describe artificial imitations of diamonds or other precious stones.

Examples:

1. She sparkled with a tiara adorned with rhinestones.
2. The singer's costume was covered in shimmering rhinestones.
3. A rhinestone necklace can be just as beautiful as one made with diamonds.
4. The dress was finished with a rhinestone belt.
5. Her earrings were adorned with rhinestones and they glistened in the light.