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.
Carbon Black is an artificial food dye. Other names include Black 7984, Food Black 2, and C.I. 27755. The chemical formula is C 26 H 15 N 5 Na 4 O 13 S 4. In other words, it is made from carbon (C), hydrogen (H), nitrogen (N), sodium (Na), oxygen (O), and sulphur (S). It is a brown-to-black azo dye. It is not permitted in the U.S., E.U, Japan, or Australia 1.