Coral is generally red and sindoori (vermilion) in colour. The use of coral in jewellery dates back to the Romans who considered it auspicious when worn in amulets. The coral, though not a precious stone, has been given a coveted place in Navaratnas. A good coral is perfectly round or oval and is smooth. It is considered flawed if it is spotted, cracked, has more than one shade of colour or the surface is twisted. The coral is also found in white and yellow colours and changes its colour as a warning of the ill health of its wearer. A coral protects against evil spirits and has the power to avert accidents. It is associated with marital happiness and should be removed at night. It is also recommended for brides as a sign of good luck.

Coral influences Mangal or Mars which is responsible for the field of activity, energy, courage, ambition, sports, property, strength, forcefulness and bravery. In Jyotish, Mangal is known as the commander-in-chief, due to its influence in organizing and managing direction in activity. Mangal or Mars is like a General with its focus on precision and power in activity. It is believed to cure blood disorders, arthritis, blisters, bronchitis, backaches, chickenpox, colour blindness, constipation, cramps, common cold, cataract, ear diseases, diabetes, foot trouble, fever, gallstones, gout, hay fever, hernia, jaundice, malaria, measles, mumps, piles, toothaches, and is also capable of preventing miscarriages.