The modern birthstone reference
In 1912, in an effort to standardize birthstones, the (American) National Association of Jewelers (now called Jewelers of America) met in Kansas and officially adopted a list. The Jewelry Industry Council of America updated the list in 1952
Source: American gem society
Alexanderite, Pearl, Moon stone
June’s birthstones range from creamy-colored opalescent pearl and moonstone to the rare color-changing alexandrite—one of the most valuable gems on earth. With this spectrum of price points and color options, people with June birthdays can choose a beautiful gemstone to fit any mood or budget.