Ambergris (Ambra grisea, Ambre gris, ambergrease, or grey amber) is a solid, waxy, flammable substance of a dull grey or blackish color, with the shades being variegated like marble. It possesses a peculiar sweet, earthy odor similar to isopropyl alcohol. Now largely replaced by synthetics, it is occasionally still used as a fixative in perfumery.
Ambergris was also molded, dried, decorated and worn as jewelry, particularly during the Renaissance. It was often formed into beads.
Ambergris occurs as a biliary secretion of the intestines of the sperm whale, and can be found floating upon the sea, or in the sand near the coast. Because giant squids' beaks have been found embedded within lumps of ambergris, scientists have theorized that the whale's intestine produces the substance as a means of facilitating the passage of hard, sharp objects that the whale might have inadvertently eaten.