metamorphic

Greenstone or Metabasalt

Metabasalt / Chlorite Schist

AI-generated identification · may be incorrect

Hardness 6-7, dark green to grayish-green color, dull to slightly waxy luster, often massive or weakly foliated structure. Contains minerals like chlorite, epidote, and actinolite.

Identified September 1, 2026More metamorphic →

Explore Greenstone or Metabasalt in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness 6-7, dark green to grayish-green color, dull to slightly waxy luster, often massive or weakly foliated structure. Contains minerals like chlorite, epidote, and actinolite.

Formation & geological history

Formed by low-grade regional metamorphism of basic igneous rocks (like basalt). Often found in ancient Archean greenstone belts.

Uses & applications

Sometimes used as a decorative stone, carving material, or in local construction.

Geological facts

Greenstone belts are some of the oldest rocks on Earth, providing clues about early tectonic processes.

Field identification & locations

Identified by its distinctive green color, hardness, and association with other metamorphic rocks. Often found smooth and rounded when collected from riverbeds or beaches.