Crystal nacre pearls by Czech brand Preciosa are a superb imitation of natural or cultured pearls. Using strict quality standards, several layers of nacre are deposited onto a lead free crystal base, faithfully imitating the beauty and luster of real pearls. Nacre pearls from Preciosa are highly resistant to abrasion, UV radiation and alcohol-based perfumes.
What is nacre? Nacre is a pearly fluid found inside pearl-producing mollusks, like oysters and mussels, that is deposited onto the surface of an irritant (usually a parasite) inside the mollusk shell. Over time, this self-defensive mechanism forms a pearl. Mother of pearl, which lines the shells of pearl-producing mollusks, is actually built-up layers of this hardened nacre.