BRASILIA, Brazil – A possible rise in U.S. tariffs after expiration of the present 90-day pause, could trigger investment in cutting and polishing in gemstone origin countries, Sara Yood, President, CEO and General Counsel at the Jewelers Vigilance Committee, told…

Rubellite is making a comeback in China, while lagoon color tourmaline has seen increases in demand and price, Andrew Lucas, Senior Vice President of Guild Gem Laboratories, told the ICA Congress. He also said in a presentation that violet sapphire…