No. Jewellery glue is harmless to red coral. Jewellery glue is a kind of glue used to stick pearls, which is harmless to red corals. Red coral is an organic gem with pleasant color, which grows in the deep sea from 0/00 to 2000 meters away from human/kloc-. It is listed as one of the three organic gems alongside pearls and amber, and it is also listed as one of the seven treasures in the oriental Buddhist scriptures. It has been regarded as a rich and auspicious thing since ancient times.