The image shows a small glass jar filled with rocks sitting on top of a table, next to a ruler and a piece of paper with a QR code on it.
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The image shows a small glass jar filled with rocks sitting on top of a table, next to a ruler and a piece of paper with a QR code on it. The jar is filled with a variety of rocks, and the ruler is placed next to it, suggesting that it is being used to measure the size of the rocks.
