Public domain photos

The image shows a black and white photo of a cluster of quartz crystals on display in a glass case. The crystals are arranged in a neat stack, with some of them overlapping each other, and there is a piece of paper with text written on it in the background.

The image shows a black and white photo of a cluster of quartz crystals on display in a glass case. The crystals are arranged in a neat stack, with some of them overlapping each other, and there is a piece of paper with text written on it in the background.Open in library