Public domain photos

The image shows a small piece of rock sitting on top of a white surface next to a ruler, with a color chart of different colors below it. The rock appears to be a brachiopod, a type of shell found in the Neolithic period.

The image shows a small piece of rock sitting on top of a white surface next to a ruler, with a color chart of different colors below it. The rock appears to be a brachiopod, a type of shell found in the Neolithic period.Open in library