A two-stone ring featuring both blue and green turquoise in sterling silver creates a within-category color contrast that demonstrates turquoise's range: blue turquoise and green turquoise are the same mineral - hydrous copper aluminum phosphate - but their different mineral context during formation produces the different color outcome. Seeing both in a single ring is both educational and beautiful: the cooler blue and the warmer green side by side showing the full spectrum of what turquoise can express. The Southwest has prized both colors for different applications in jewelry tradition, and together they create a ring with the story of an entire material category.