Hawaiian Red Alaea Salt is a traditional Hawaiian table salt. A natural mineral called "Alae" (volcanic baked red clay) is added to enrich the salt with iron oxide. This natural additive is what gives the salt its distinctive red color. The clay imparts a subtle flavor that is said to be mellower and more earthy than regular sea salt.
Bamboo Salt is made by putting coarse gray sea salt in cylinders of aged bamboo, capping it with a special ceramic-type clay, and roasting it in a pine wood-fired furnace at temperatures nearing the melting point of salt, which is 800.8° C (1473.4° F). The whole process is then repeated seven more times, with each roast exchanging properties between the pine fire, the pine resin, the clay, the bamboo, even the iron of the oven.