Google unrefined salt or unrefined Sea Salt , or unrefined ocean salt .
It should be unrefined, and without any additives.
That is the best salt for human consumption.
Why?
Cause it has been consumed by our ancestors during the last 100 million years.
It is in our blood and in our tears.
It is produced all around the globe, wherever you have oceans and sea, and enough sun to evaporate water.