 Chaos are very unusual crystals. They grow on the seafloor, here's basically the seafloor and you see these very large crystals that form at very low temperatures around zero or even less than that and you have to have very alkaline waters. Its chemical composition is calcium carbonate and six waters called exa-hydrate and it's a very metastable crystal so at the later stage the water will disappear and it will be calcium carbonate or sometimes the calcium is replaced by iron it's called cedarite.