Black Mother of Pearl / MOP 24-29mm handmade flower beads (ETB00359) Bryozoan Coral 5x4mm (47 PCS)

5x4mm (47 PCS)

** One string about 14 pieces

dark brown with some black and white

Black is caused by manganese

Fossilised Red Horn Coral comes from the Silurian Age which dates to 390 million years old and falls within the Paleozoic Era

Black Mother of Pearl / MOP 24-29mm handmade flower beads (ETB00359) Bryozoan Coral 5x4mm (47 PCS)Mother of pearl, is an organic inorganic composite material produced by some molluscs as an inner shell layer; it is also what makes up the outer coating of pearls. It is strong, resilient, and iridescent. Mother of Pearl is found in some of the more ancient lineages of bivalves, gastropods, and cephalopods. However, the inner layer in the great majority of mollusc shells is porcellaneous, not nacreous, and this usually results in a non iridescent