The soothing stones of pearl and moonstone represent the month of June and are the traditional (pearl) and modern (moonstone) birthstones. Pearls are one of nature's only absolutely natural 'gems' and are covered in an envelope of luminous nacre. They are believed to displace anger and wrath and are associated with purity and virtue. Moonstone, with its subtle iridescence, is associated with fertility and harvest. It is believed to moderate emotion and encourage feminine qualities.