In search of vendors of ethically mined gems and recycled gold? Check out these organizations:

1. Gemfields brings ethically mined gems—including Zambian emeralds—to market transparently, while upholding rigorous social and environmental standards. (gemfields.co.uk)

2. The Jeweltree Foundation in the Netherlands works with diamond miners in Lesotho. (jeweltreefoundation.org)

3. The Green Gem Foundation, a Berkeley, Calif.–based nonprofit collective of cutters with direct links to African miners, provides loose colored stones. (greengemfoundation.com)

4. Fairtrade and Fairmined Gold enables artisanal and small-scale miners to improve their livelihoods and assures consumers of responsible sourcing. (fairgold.org)

5. Both De Beers’ Forevermark and BHP Billiton’s CanadaMark are hallmarks that guarantee the diamonds are conflict-free, natural, and untreated. (forevermark.com; canadamark.com)