A report released today by the Washington, DC-based environmental group Earthworks…evaluates progress jewelers have made in pursuit of cleaner sources of precious metals…Jewelry companies…[are] endorsing the Golden Rules, a set of principles for more responsible mining…urging the mining industry to end practices that harm local communities, pollute drinking water, and generate millions of tons of toxic waste...Target, T.J. Maxx, and Harry Winston are among the retailers who…have repeatedly declined…supporting the Golden Rules…[The report] includes a scorecard to assess how signatories of the Golden Rules are complying with its requirements…Birks & Mayors…Tiffany & Co., and…Herff Jones reported making the most progress . Smaller jewelers reported making the largest strides…including…Brilliant Earth, London's Cred Jewellry, Lena Marie Chelle Designs, and Real Jewels. [also refers to Sears]