The 5 Rarest Gemstone Cuts of 2026: Old Mine, Marquise, and Rose Cuts
For years, I dismissed any gemstone that wasn’t a round brilliant. I believed the charts: ideal proportions, maximum fire, perfect symmetry. Anything else, I thought, was a compromise. Then a client showed me her great-grandmother’s engagement ring — an old mine cut diamond set in rose gold. The stone didn’t sparkle like a modern diamond….