Pearl, Coral, Shell Pendant Style Necklace

This necklace is from an estate and features a single strand of mother of pearl beads and nuggets accented with tiny coral beads and "slabs" of  what appears to be petrified wood. The pendant is an arc shape 1-3/4" x 1/2" thick - this appears to be a natural material although it is not amber or wood - maybe also petrified wood. Very smooth and interesting.  A wonderful necklace for summertime fashions !  I think this will get a lot of wear....