The Sel lamps are designed by Iza from the Siwa Oasis in the Sahara Desert. The salt comes from one of the large salt lakes in the Oasis and is collected by the locals, who process the large blocks of salt. In the salt, you see dark lines, they are marks after all the sandstorms that happen in Siwa. The sand that arrives in the lake becomes part of the salt blocks and that is how the dark lines are created. INFO: Salt dissolves immediately if it is in contact with water. So do not place the lamps outside. Brass salt shaker