A bypass ring in platinum or higher-karat gold will maintain its crossing shape through years of daily wear. That structural resilience is what makes metal choice matter here more than it does for a standard band.
A Storied Heritage
The discovery of large amethyst deposits in Brazil in the nineteenth century had an unusual effect on gemology. A precious stone was reclassified as semiprecious through market force alone. The royal purple that had associated amethyst with monarchy and clergy for millennia neer changed. When the supply expanded, the category changed.