As it is found in all spectrums of color, Tourmaline is often described as the "chameleon gemstone". The colors range from Yellow Green to Olive Green. Green Tourmaline is very durable and well suited to virtually all jewelry settings. Green Tourmaline is typically not treated. Tourmaline is a birthstone for the month of October and the gemstone representing the 8th wedding anniversary. It was once believed that it protected the wearer against bad decisions, many dangers, and misfortune. It is also know to attract friends and lovers. Tourmaline is available in all sizes ranging from small to over 100 carats; however, stones of a rare color are often found only in smaller sizes.