Nacre Definition

Nacre Sentence Examples

• The zone of the external surface of the mantle within the edge secretes a layer formed of prisms of calcite; the rest of the epithelium from this zone to the apex secretes the inner layer of the shell, composed of successive laminae; this is the nacreous layer, and in certain species has a commercial value as nacre or mother-of-pearl.

• Thus the growth of the shell in extent is due to additions to the prismatic layer at the edge, its growth in thickness to new layers of nacre deposited on its inner surface.

• Nacre is the substance that forms around the original "seed" of the pearl.

• The beautiful variety of pearl colors is the result of the nacre the oyster produces.

• All pearls are layered with nacre, the gradually thickening coating that covers the initial irritant to form the pearl, and nacre is the same material as the oyster's shell, creating an opalescent sheen known as "mother of pearl."