June Gems refers to the birthstones associated with the month of June. The most common birthstone for June is Pearl, which is a hard, round object created by a living organism in the sea. Pearls are often used in jewelry and have been highly valued for centuries. Other June gems include Alexandrite, Moonstone, and Agate. Alexandrite is a rare gemstone that changes color depending on the light source. Moonstone is a milky white gemstone that reflects light in a unique way. Agate is a banded stone that comes in a variety of colors.