Public domain photos

The image shows two rocks on a white tray with a ruler next to them. The rocks are brown in color and the tray is white. The ruler is placed on top of the tray, suggesting that the rocks are being measured.

The image shows two rocks on a white tray with a ruler next to them. The rocks are brown in color and the tray is white. The ruler is placed on top of the tray, suggesting that the rocks are being measured.Open in library