My jewelry has been made exclusively from the certified green gold
and platinum from Oro Verde for several years now and I have been
very happy working with the folks there and with the metals.
I recently spoke to someone in the refining dept. at Hoover & Strong
and was told that I could order pretty much any mill or grain product
of theirs in sterling or in any of the karat golds and request that
they be 100% recycled content. So that can be another alternative.
Columbia Gem House in Washington state offers many gemstones -
calibrated and one of a kinds that are fair trade ( or varying
degrees thereof - and they will be happy provide details). I get
several queries a month from fellow jewelers for this kind of
I'm happy to share it and hope others will chime in here
with solutions they have found too.