New Moon Beginnings on Instagram: "Geology of Sugilite Sugilite is a rare and coveted sodium potassium lithium silicate mineral. However, iron, manganese, and aluminum are usually present and can replace each other, leading to different colors and varying sugilite crystal properties. The trace amounts of manganese are what gives sugilite its vivid pink to grape purple color. Sugilite is typically a pinkish-purple hue, but can range from lavender to deep purple and may even be black, pale brownis