Public domain photos

The image shows a piece of rock with a ruler next to it, and at the top of the image there is some text which reads "Sulphur". The rock is a light brown color and has a rough texture. The ruler is a standard measuring tool with a black and white color scheme.

The image shows a piece of rock with a ruler next to it, and at the top of the image there is some text which reads "Sulphur". The rock is a light brown color and has a rough texture. The ruler is a standard measuring tool with a black and white color scheme.Open in library