Mined Black Diamond sterling silver ring from Tom Wood featuring silver-tone, gold-tone, sterling silver, rhodium plating, brilliant cut diamond, polished finish and pull-on style. When buying this unisex item, keep in mind that it is graded in standard men's sizing.. Normal everyday use and external agents may reduce the lustre of gemstones and gold surfaces. To maintain, use specific, non-abrasive products specially meant for cleaning jewellery..