Alexandrite or alexandrite is a variety of chrysobel that stands out among other precious stones because it has the ability to change color depending on the angle from which it is viewed. This is done thanks to its crystallized structure in rectangular prisms, which causes vivid reflections to occur. This is the reason why it is usually cut in cabochon, that is, with a rounded shape to increase the amount of reflections. You have all the information in: «List of the most precious rocks and minerals on the planet«.
You have all the information in: "List of the most precious rocks and minerals on the planet".