A tree that means a lot to me is the Astrocaryum vulgare. It is a palm tree, the seeds of which produce a black wood. Indigenous people, unable to afford gold, used the black wood for marriage rings.
Christian missionaries wore them as a sign of solidarity with the poor. A symbol of a desire for equality, social justice and human rights.
I was given by friends both a solid black wood ring and an Amazon gold and black wood ring. The man who gave me the gold and black wood ring said the gold symbolised the richness of the country I came from and the black wood the forest he came from, forever entwined. I wear them everyday to remind me of the forest to which I am eternally bound.