Mother of pearl
Dear Mom, you raised me to be a finest pearl.
Pearls are formed inside the shell of certain mollusks as a defense mechanism against a potentially threatening irritant such as a parasite inside the shell, or an attack from outside that injures the mantle tissue. The mollusk creates a pearl sac to seal off the irritation. Like mother love that will protect her children from everything bad until she made her children to be like a finest valuable pearl.