Gemological Science International (GSI) has re-engineered the processing paths for gem identification and grading. Our unique GSI gem identification and grading methods have made our process incredibly efficient while maintaining the accuracy and integrity of our results, allowing us to offer a world-class product at an affordable price.➥ GSI pro… Read More


New York—Gemological Science International just opened a new facility in New York that does nothing but test jewelry for lab-grown diamonds.The lab caters to GSI’s retail customers in the United States, and the company said it will serve as a hub for both manufacturers and retailers that want to have their diamond jewelry screened before it goe… Read More