タイトルまたは説明

rough red coral from tunisia,
A coral is a kind of marine life form, which has an exoskeleton (comprised of calcium carbonate), and it is comprised of colonies of polyps. Red coral is a name used to encompass multiple reddish colored corals. Used in the gem business, the colors of red coral range from pink and salmon to the now rarest color, a rich red (also called ox blood red); this color comes from carotenoid pigments.