Coral

Coral has been called the "garden of the sea" because it was once believed to be a plant. Instead, coral belongs to a small, but important group of organic gemstones. 

“Red Coral is a gemstone that has a meaning and properties of vitalizing life energy. This special red color symbolizes “blood.” It can strongly circulate energy in a human body. ... Red Coral has a meaning and properties of prosperity and it is both effective for business and love.”