How does Tiffany define “Tiffany heritage stones”?

Tiffany heritage stones are those for which traceability to a specific country or region of origin was not possible at the time of sourcing. Tiffany is proud to be leading the way in raising the standards for diamond transparency and advocating for better diamond sourcing practices around the world. All Tiffany diamonds, regardless of when they were sourced, are sourced responsibly.