PEARL COLOR - mother of pearl has different shades of colors - from white to almost black. Shells with quality nacre found in warm tropical seas: in the Persian Gulf, the Red sea, near the island of Ceylon and the Pacific Islands. The world pearl market supply Japan and the Philippines. Beautiful dark mother of pearl give shell abalone-haliotis. White mother of pearl shell give the Indian sea pearl. Pearls and mother of pearl have almost the same composition. They are constructed of the finest plates of calcium carbonate(aragonite) that is immersed in the organic substance - conchiolin. HEALING EFFECT - powdered pearl and pearls can be bought in any medieval pharmacy until the 18th century. This was attributed to the healing power that can help from any disease. It is not excluded that members of the mother-of-pearl minerals is really able to have a stimulating and strengthening effect on the human body. ZODIAC SIGNS - Aquarius, Pisces, cancer.