Petrified Wood CoasterArtisans hand process fossils into functional bowls and dishes. Sourced from the forests of Indonesia. Majestic trees have been preserved beneath layers of volcanic sediment over hundreds of years. The organic process of permineralization transforms them from wood to rock, leaving behind fossils ringed in gorgeous earthen hues. The sheer weight and density of the stone can be a bit surprising. Size, shape & condition vary.