Petroglyphs i'm pretty sure.
You can write with a soft stone on a harder stone; writing with chalk on slate is a familiar example.You can also write with a hard stone on a softer stone, using the harder stone as an engraving tool. There are a lot of examples of this on paleolithic artifacts.
The semi precious stone turquoise is made of hydrous phosphate. It is a rather soft stone that used to make ornamental jewelry.
If your feet are tough and calloused, the best thing to use is a pumice stone, during or after your shower or bath, to remove as much of the callouses as possible. Use the stone every time you bathe, or take the time to soak your feet, and use the stone. Follow with a good lotion. Over time, you will see improvement.
This means that a footprint was once made in mud or other soft material, which later turned to stone and preserved (or saved) the shape of the footprint inside of it.
avoid soft drinks (Coke) exercise
Hmm..A couch is soft because, it would not be as comforatable if it was made of stone.
Argentina
sulait
It is both hard and soft rock becasue of the elves living inside it.
kernel
The cast of Soft Power Health - 2009 includes: Jessie Stone
It is a soft, grayish stone, usually with white streaks.
Pipestone County
Pipestone, Minnesota!
No. Gold and Silver are soft metals. You would scratch it horribly if you tried to polish it with a pumice stone.
Petroglyphs i'm pretty sure.