Every piece of moss agate is unique and these carved and polished skulls are no exception. From pale green hues with lots of veining to deep teals and emeralds with scattered white inclusions, the signature of this stone are the dendritic filaments resembling ferns, moss, branches, and other vegetation creeping over its surface. In addition to its beauty, moss agate is said to promote stability and grounding, promote focus and concentration, and bringing a sense of tranquility to the holder.