Septarian Drusy Dragon Egg Home DecorDragon Egg Septarian is a gorgeous crystal that is millions of years old. The Septarian crystal is a mix of Aragonite, Calcite, and Limestone. The name Septarian comes from the Latin word septum, meaning the number seven. It was named this because it forms in patterns of seven. The brown color that you see is Aragonite, and the Taupe color is Limestone. Aragonite is an excellent meditation crystal, and it can bring soothing Energy into a room or into