When searching for a smooth or textured calming stone, there are a variety of options, but many did not have that smooth, organic stone feeling.

The shape of this feels nice in your hand, has smooth edges and a concaved top for the wavy pattern. I also recommend using a textured plate, if you would like to have that additional feel on the bottom of the stone.

Print settings are straight forward, with a couple specific adjustments to keep that smooth, organically shaped stone feeling, while still allowing it to keep the texture.

I wanted a little bit of weight, without using up too much filament:

Standard layer height- 0.2

Randomized seam position - to avoid a straight line down the side of the stone

4 Wall loops

20% infill with Gyroid, to give it a bit more “heft”, without the cost of too much filament

For the “Large” profile, I've increased infill to 50%. This gives it that “heavier” stone feel

I recommend using Variable layer height - > Adaptive and then drag the slider toward "Smooth." This will use thinner layer  specifically on the concave face, so it feels like a river stone.