Spodumene is a fairly prevalent mineral, but mostly dull and uninteresting in its most common forms. However, its two distinctly colored transparent varieties, Kunzite (pink) and Hiddenite (green) are very aesthetic. Spodumene is strongly pleochroic. The pleochroism is easily observed in many transparent crystals, where the color ranges from yellow to violet when viewed at different angles. Pink Kunzite will often exhibit a deeper pink color on crystal terminations due to the pleochroism. Spodumene is a very important ore of the element lithium. Pink to purple spodumene is known as kunzite.