I, for one, don't care if it's not really a gemstone... I'm crazy about coral.
Coral is the skeleton of sea organisms, consists of almost entirely calcium, and is found in the reefs of warm seas all over the world. Colors range from pink, salmon pink, red, white, black, gray.
Almost every ancient civilization has used coral for healing or religious purposes. It was considered common knowledge that coral stanched the flow of blood, cured madness, and imparted wisdom. The ancient Egyptians placed pieces of coral in tombs as a protection against evil spirits because they believed that each piece contained a drop of divine blood. The Greeks believed coral was a protective stone against disease and magic.
Coral jewelry is often recommended for menopausal women because it protects against negative energy while preventing the loss of energy and vitality. Coral is said to prevent osteoporosis and promote healthy bone formation in children, as well as formation of new tissue of all kinds. Coral also can be beneficial for anemia. Edgar Cayce suggested coral for quieting emotions.
Coral symbolizes happiness and joy. It eases depression, improves expressiveness, banishes nightmares, and restores mental clarity. Red coral is said to be especially stimulating. Pink is said to be especially soothing.
Red coral is associated with Scorpio. Pink coral is associated with Taurus. However, coral has a zodiacal affinity with all signs.