I made my bath salts soap, so far so good. I ended up using a different scent of salt since I didn't have much of the lavender. The new salts (rose) didn't have mineral oil, instead it had glycerine. It ground really nicely in a coffee grinder. A good mix of fine and medium grains.
I was hoping for colored salt bits but the color immediately came off and mixed into the batter, turning it very pale pink but thats ok, I separated a small amount and colored it pink so now I have a nice two tone batch.
The scent didn't come through but that not surprising. Really make me wish I had a bit of rose FO to add but I'm ok with unscented soap. I should be able to cut in a hour or so, will post pics once its cut.