Is this ball natural or artificial? / Ist diese Kugel natürlichen Ursprungs oder nicht? - WITH SOLUTION

Is this ball natural or artificial? / Ist diese Kugel natürlichen Ursprungs oder nicht?

Liebe Steemianer! Dear Steemians!

Diese Kugel wirkt doch irgendwie deplatziert dort, oder?
This ball looks quite out of place, doesn´t it?

Ist sie natürlichen Ursprungs oder menschengemacht, was meinst Du?
Is it of natural origin or man-made?

Don´t cheat by searching for the pic! In a few days I will add the solution.

• It is natural

• It is man-made

• Tough one, I am not sure

Answer the question at dpoll.xyz.

SOLUTION:

10 accounts participated in the poll:

The majority was right - this ball is unusual, but completely natural!
It is called a concretion, and the pic is from Champ Island.