darkstone
nounUK /ˈdɑːkstəʊn/
US /ˈdɑːrkstoʊn/
A dark-colored rock that you can find on the ground.
He picked up a smooth darkstone from the riverbank.
OTHER MEANINGS
2. A building material made of dark-colored stone.
The old castle was built from darkstone.
3. In fantasy games, a magical stone that is dark in color.
The wizard used a darkstone to cast his spell.
4. A type of dark gemstone used in jewelry.
She wore a necklace with a shiny darkstone.