Congratulations, you've discovered an Andalusite Gemstone!!
A clear variety of Andalusite was first discovered in Andalusia, Spain, which was how it received its name.
Faceted andalusite stones give a play of red, green, and yellow colors that resemble a muted form of irridescence. It is actually pleochroic, which means it appears different colors when viewed from different angles. With a hardness of 7.5 on the Mohs scale, it is suitable for all types of jewelry.
Andalusite is found in Australia, Brazil, Canada, Russia, Spain, Sri Lanka, and the United States.