All of the wood used is locally sourced from my own forest, and sometimes gifted to me. 
When it comes to paper prints I try to use unbleached and thick paper when I come by it
(besides being better quality it gives a more warm feeling to the images). 
Bones I use are acquired ethically by scavenging, gifts or from local hunters. 
I clean and process these myself without any chemicals and use natural dyes.

Everything that is made of wood is dried and handled by me to be durable and prevent cracking, but even though the wood is sealed by laquer, wax or sometimes even charring techniques and oils it is still wood and the material can get worn with age.
I always specify what wood is used, how it was sealed and if it can be treated more.
But I recommend love and care, as with all precious things, to make your jewerly, charms or art-pieces last a lifetime. 
For example: I do not recommend going for regural swims with the wooden charms, 
but one dip in the moonlight won't hurt.