Scaffolding is not in charge of calcium carbonate crystals. The scaffolding theory of biomineralization suggests that an organic matrix acts as a template or scaffold, guiding the nucleation and growth of inorganic crystals into specific shapes and structures. However, this concept primarily applies to the formation of certain biominerals such as bone tissue, mollusk shells, and other biogenic materials composed of complex organic-inorganic composites. Scaffolding is not necessarily involved in the crystallization of pure inorganic mineral phases like calcium carbonate crystals, which form naturally through various mechanisms not tied to organic scaffolds.