moodstone
nounUK /ˈmuːd.stəʊn/
US /ˈmuːd.stoʊn/
A moodstone is a special stone that people say changes color to show how you feel.
She looked at her moodstone and saw it turn bright blue when she felt happy.
OTHER MEANINGS
2. A decorative stone that shifts color with temperature or light, often worn as jewelry.
The moodstone on her necklace glowed pink in the warm sun.
3. In fantasy stories, a magical stone that reflects a person's inner emotions.
The wizard's moodstone darkened whenever danger was near.
4. A small token used in games to represent a character's feelings or state.
Each player placed a moodstone on the board to show their character's mood.