Currently, the glass industry exclusively uses "pure" white sands found in only a few quarries worldwide. This is because "wild" sands are deemed impure and inefficient as they require a higher level of skill and knowledge to effectively be transformed into glass. To challenge these conventions, Atelier NL began researching the geological history and chemical composition of sand. The designers followed the path of ancient Roman glass merchants, taking samples of eighty types of sand. With this diverse array of samples, they conducted over a thousand glass tests and experimented with how the material reacts to different levels of heat: when melted at high temperatures, natural sands fracture, foam, and crystallize according to their unique mineral signature. This research culminated in the creation of Atelier NL's first material archive — a glass library that displays varying colours, textures, and crystallization patterns.