The basic composition of this gem is calcium carbonate (CaCO3). The specific gravity is 2.65 and refractive index ranges between 1.486 and 1.658. Its hardness on the Mohs scale is 3.5 to 4. It is a semi-translucent to an opaque material.
Chemical composition of Red Coral (Moonga)
Red Coral is made of CALCIUM CARBONATE.
CaC03 (Calcium Carbonate)
Flesh pink, pale to deep rose red, salmon pink, red to dark ox-blood red (this one being the most rare and priced).
1.486 – 1.658
Red Coral is a hot gem. It is used to improve Mars. It is responsible for accidents, cuts, wounds and operations. If ones Mars is weak or attenuated than that person will be short tempered, rough in nature and will brute. He will put himself in malpractices. Coral gemstones are known to have many healing powers.