Tree of Life Tie Tack

This is a classic tie tack, depicting a detailed tree of life.

It is mounted onto a stainless steel pin back (photo #3 shows a brass example of those pin backs).

It measures15mm in diameter (for larger pins, see photos 5+6).

Wikipedia' offers this information:

"The concept of a many-branched tree illustrating the idea that all life on earth is related has been used in science, religion, philosophy, mythology and other areas. A tree of life is variously,

a) a mystical concept alluding to the interconnectedness of all life on our planet,
b) a metaphor for common descent in the evolutionary sense, and
c) a motif in various world theologies, mythologies and philosophies.