Septarian tumbled stone. * Price is for one crystal. Colour, size and shape will vary due to the beauty of Mother Nature. Approx. size 2-2.5cm Known as the NLP stone, Septarian works to break old, unserving beliefs, to allow new, more positive ones to be formed. It nurtures and grounds, bringing feelings of happiness and understanding. It's also thought to improve the communication skills of those who work with it.