Fleur De Sel
"Flower of salt" in French it's made drawing seawater into artificial salt pans and allowing the water to evaporate. While most of the salt gets on the bottom of the pan (and is later collected as ordinary sea salt), some salt crystals float on the surface of the water, forming a delicate crust of intricate pyramidal crystals, the "fleur de sel". Due to variable algae and bacteria concentrations, vivid colors are created in the evaporation ponds.