Most commonly found in Brazil, Afghanistan, and Mozambique, this October birthstone takes the spotlight in every Tourmaline Engagement Ring. Tourmaline is known for its color diversity, ranging from different shades of green, blue, pink, red, yellow, and even black! In rare circumstances, multi-colored tourmalines can form. This explains the origin of the word “tourmaline,” which comes from the Sinhalese word turamali, meaning “stone of mixed color.”