The oysters are nucleated with a bead composed of mother-of-pearl and a small piece of mantle tissue. This bead becomes the nucleus of the pearl and is the reason akoya pearls are more often perfectly round.
Carbon definition, Chemistry. a widely distributed element that forms organic compounds in combination with hydrogen, oxygen, etc., and that occurs in a pure state as diamond and graphite, and in an impure state as charcoal.
Atomic carbon. Atomic carbon (systematically named methanediylidene and carbon), also called monocarbon, is an inorganic chemical with the chemical formula C (also written [C]). It is a gas that only exists above 3,642 Â°C (6,588 Â°F), below which it aggregates into graphite or other fullerenes.