A giant ball shaped boulder almost covered in sand on the beach at Moeraki South Island New Zealand Stock Photo - Alamy, boulder ball

Spherical concretions hi-res stock photography and images - Alamy

Round boulders beach new zealand hi-res stock photography and images - Alamy

Seascape moeraki hi-res stock photography and images - Page 2 - Alamy

Moeraki stones hi-res stock photography and images - Alamy

Round boulders beach new zealand hi-res stock photography and images - Alamy

Round boulders beach new zealand hi-res stock photography and images - Alamy

Moeraki boulders round rocks on hi-res stock photography and images - Alamy

Broken boulder hi-res stock photography and images - Alamy

Moeraki Boulders: The giant marbles of New Zealand – Deposits Mag