Septarian's are very useful for healing work.  They give us the "Big Picture" prospective when trying to process different events or situations in our lives.  Yellow Calcite is a Solar Plexus stone that supports our sense of self.  The brown and black Aragonite add a grounding and stabilizing energy.  Two are available and I will intuitively choose for you.  Each piece measures 2.58 x 1.87 inches.