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An extinct volcano in Arkansas hosts the only public diamond mine on Earth https://www.greenground.it/2025/08/19/an-extinct-volcano-in-arkansas-hosts-the-only-public-diamond-mine-on-earth/
An extinct volcano in Arkansas hosts the only public diamond mine on Earth https://www.greenground.it/2025/08/19/an-extinct-volcano-in-arkansas-hosts-the-only-public-diamond-mine-on-earth/