Not necessarily, if they are rounded cobbles? They will be a hard impermeable rock, and when you rinse them you will have washed away all the salt (NaCl).You just can´t use a "salt rock" in a sweet water tank. Forget it..
No matter how much you boil them there always salinity in it. It´s in is composition -
Honestly you don't need to, if it is a smooth, round cobble, it won't contain any sea salt (NaCl) in the rock matrix, only very hard rock will become rounded, and very hard rocks are impermeable.But you can´t determine the concentration of mineral salts of each rock..
This can happen if you have a rock with pore spaces, or voids, in it.you can boil a rock a couple of times, do some testing, conclude that all it´s ok and put the rock in a layout. A couple of weeks before or more, surprisingly you notice salt water in the tank ..
Have you ever try to find out what type of rock it was??This hapens to me.
Because the carbonate has undergone pressure and heat whilst under the earth and the salt has been reacted with other constituents. Digging around on Google reveals 0% NaCl in limestone.I wonder and ask myself now, why rock formed by oceanic deposites doesn't contain salt?
Because the carbonate has undergone pressure and heat whilst under the earth and the salt has been reacted with other constituents. Digging around on Google reveals 0% NaCl in limestone.
Anyway if it did survive, most would be embedded in the rock, thus not available to be dissolved in water.