" Conchiolin," the matrix of shells of the mollusca, is only slightly soluble in acids. ... Nacre is made of two substances, aragonite -- which is translucent, giving the pearl its beautiful lustrous appearance and conchiolin -- which acts as a glue holding the layers of aragonite together.

What is conchiolin made of?

Conchiolins (sometimes referred to as conchins) are complex proteins which are secreted by a mollusc's outer epithelium (the mantle). These proteins are part of a matrix of organic macromolecules, mainly proteins and polysaccharides, that assembled together form the microenvironment where crystals nucleate and grow.

What is the meaning of Conchiolin?

: a scleroprotein forming the organic basis of mollusk shells (as mother-of-pearl) — see nacre sense 2.