For his upcoming exhibit in Tokyo, designer Tokujin Yoshioka is making a natural crystal chair from scratch. He’ll do this by submerging a nucleation-inducing fiber structure in four giant tanks of water, and then letting visitors watch as crystals form and the chair grows into its natural shape. (This image shows the artist working on a prototype.) The exhibit kicks off on October 17, and features other cool artsy objects made entirely out of nature.