Step 1: Filter the mixture to separate the stones from the water and chalk powder. The stones will be retained on the filter paper, while the water and chalk powder will pass through.

Step 2: Allow the filtrate (water and chalk powder) to settle in a container. The chalk powder will settle at the bottom of the container due to its higher density.

Step 3: Decant the supernatant (water) carefully without disturbing the settled chalk powder.

Step 4: Dry the chalk powder by spreading it out on a flat surface and exposing it to the air or by using a low-heat oven.

_By following these steps, you can effectively separate the mixture of chalk powder, water, and stones._