I source my silver from the Fundacion Eco Andina in Argentina. Eco Andina silver is ecologically mined and fairly traded. It is mined Alluvially and there is therefore no mercury or cyanide used in the process - minimising the distruption to the environment. Eco Andina has also established a rehabilitation program for former silver miners from Bolivia.
Eco Andina silver is certified by the Jeweltree foundation - you will recieve a number with your purchase that can be put into their website to trace the silver in your jewellery from the ground to you.
For more information please see www.jeweltreefoundation.org and www.ecoandina.com