The Moeraki Boulders, Koekohe Beach, New Zealand’s The huge, gray, spherical boulders formed in sediment on the sea floor 60 million years ago were revealed by shoreline erosion - can weigh several tons & measure 10 feet across.
Rare Opalized Wood: "Petrified wood is basically fossilized wood that has had its organic matter replaced by a mineral such as agate, bit by bit, as it decomposes. The wood structure is maintained, but the wood fibers are slowly changed into stone.
Moeraki Boulders, known as the 'Dinosaur Eggs, New Zealand. The Moeraki Boulders are unusually large and spherical boulders lying along a stretch of Koekohe Beach on the wave-cut Otago coast of New Zealand.