1. a type of metamorphic rock that is typically green in color, often containing minerals like chlorite or epidote
Usage: geological
2. a hard, green stone such as jade or nephrite, especially as used for making tools or ornaments
Usage: archaeological

Examples

• The ancient tools were carved from greenstone found in the nearby mountains.
• Geologists identified the rock formation as greenstone schist.
• The Maori people traditionally used greenstone to make jewelry and weapons.
• The greenstone belt contained valuable mineral deposits.
• She wore a beautiful greenstone pendant around her neck.
• The museum displayed greenstone axes used by early inhabitants.