When it comes to the birthstones that belong to the ones born in June, alexandrite is the rarest and the most expensive. This gemstone is known for its color-changing ability and an umpteen number of benefits. It appears emerald green in daylight and ruby red in incandescent light which makes it different from other gemstones found on Earth's crust. June is the birthstone month of Alexandrite and it is easily available at some jewelry stores that specialize in the sales of rare gemstones. In this article, we're going to discuss the gemstone's origin and its benefits.