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ABOUT Isua Stone
This is a rare stone form the supracrustal belt in Greenland.
Only recently discovered this mineral is among the oldest that has been identified. Isua Stone is over 3.75 billion years old, from the Archaean Eon, The Archean Eon began about 4 billion years ago with the formation of the Earth's crust and extended to the start of the Proterozoic Eon 2.5 billion years ago.