Isidore Kozminsky, The Magic and Science of Jewels and Stones
“ The Hindus included the pearl amongst the five precious stones in the magical necklace of Vishnu, the other four being the diamond, ruby, emerald, and sapphire.The golden pearl was the emblem of wealth, the white of idealism, the black of philosophy, the pink of beauty, the red of health and energy, the grey of thought. Lustreless pearls are considered unfortunate, as also are pearls that have lost their sheen when on a dying person’s finger, as sometimes happens. It is curious how pearls improve in lustre when worn by some persons and how they deteriorate when worn by others. ”
