CORAL

Coral is made up of the skeletal remains of marine animals called Coral Polyps. These tiny creatures live in colonies which form branching structures as they grow, eventually resulting in coral reefs and Atolls. Most corals are made of Calcium Carbonate and have red,pink,white and blue colours. But black and golden corals are made of a horn like substance called conchiolin. Out of all Red coral is most precious. Red coral is found in Japan, Mediterranean and African coasts. Black and golden coral is found in West Indies and Australia.
Coral has hardness of 3; specific gravity 2.68; Refractive index 1.49-1.66 and Trigonal crystal structure. The chemical formula is Ca CO3 ( or C3H48N9O11).
The main effect of stone is in tissue regeneration and increase in blood cells. It decreases leukemia, fever, madness, nightmares, asthma, teething troubles, sterility, constipation, jaundice, obesity, rickets, rabies, menorrhagia, varicose veins, anaemia, haemorrhaging, arthritis. It helps balancing spleen, mucous membrane, bile, spine, circulation, spinal canal, alimentary canal, nervous system, Thalamus.
Red coral is the precious stone for Mars. The semi precious substitute for this is Carnelian.
Carnelian is reddish orange variety of Chalcedony. It has hardness of 7; specific gravity of 2.61; refractive index of 1.53-1.54 and Trigonal structure of crystals. It is basically Silicon Dioxide with formula as SiO2. Best Carnelian is from India.
Carnelian increases fertility, tissue regeneration, elasticity of blood vessels and assimilation. It is helpful in reducing nosebleed, anorexia, fear, rage, gallstones, kidney stones, pollen allergies, and impotence. One of the main functions carnelian does is to balance sexual energies. It also balances endocrine system, spleen, pancreas, reproductive organs, liver, kidneys, gallbladder.