Black Hills Gold Marquise Green Gemstone and Diamond Ring

This is a contemporary fine jewelry ring produced by the South Dakota Gold Co., characteristic of the regional Black Hills gold style. The centerpiece is a marquise-cut green gemstone, likely an emerald or green tourmaline, held in a multi-prong setting. It is flanked by small round diamond accents. The band is constructed from yellow gold and features the iconic Black Hills motif of rose and green gold leaves sculpted in relief. This tri-color gold effect is achieved through alloying gold with copper (for rose) and silver (for green). The craftsmanship showcases intricate foliage textures typical of the late 20th to early 21st century. The item is presented in its original white velvet-lined display box with the maker's logo silk-screened on the inner lid. Accompanying documentation suggests it is in excellent condition with no visible chips to the gemstones or significant thinning of the shank. The design balances a nature-inspired aesthetic with traditional gemstone mounting, representing a significant American regional jewelry tradition from the Black Hills of South Dakota.