It usually takes two to four weeks for the eggs to hatch and for the baby snails to emerge, shells and all. The shell of a baby snail, often referred to as a protoconch or “earliest shell,” is colorless and very soft.

Does a snails shell grow as it grows?

Shell growth

As the snail grows, so does its calcium carbonate shell. The shell grows additively, by the addition of new calcium carbonate, which is secreted by glands located in the snail's mantle. The new material is added to the edge of the shell aperture (the opening of the shell).

How snail shell is formed?

At birth, the visceral hump turns along its lineal axis, eventually creating a coiled snail shell. Young snails have shells that are nearly transparent. The older they get, the thicker their shells become. Glands that are distributed across their body solidify the shell with calcium carbonate.