Moonga, red and sindoori (vermilion) in color. The use of the coral in jewellery dates back to the Romans who considered it auspicious worn in amulets. Because of it auspiciousness, the coral, through not a precious stone, has been given a coverted place in Navaratnas. A good coral is opaque red, is perfectly round or oval and regular; is smooth, and gives out lovely splendorous. It is flawed if it is spotted, cracked, has more than one shade of color or the surface is anyway depressed or twisted.