Public domain photos

The image shows a piece of rock with a white and black pattern on it, set against a white background. On the right side of the image, there is a scale, indicating the size of the rock, which appears to be a xenolith.

The image shows a piece of rock with a white and black pattern on it, set against a white background. On the right side of the image, there is a scale, indicating the size of the rock, which appears to be a xenolith.Open in library