This natural cabachon comes from southern China and is known as "picture stone".  It is a fossilized dendritic siltstone that takes millions of years to form under heat and tremendous pressure.  The patterns resemble plants, but are really various minerals that were imbedded with the silt.  I did create a pendant that mimics the plant shape occurring in the stone.  It can be worn on your choice of choker or chain with either side facing outward.