A Multinational Diamond & Gemstone Jewelry Wholesale Company. The finest quality available at the lowest price possible! From your imagination to our diamond collection, to your door. GemsNY.com is a world-renowned online gemstone and diamond jewelry store. By offering only certified, genuine and hand-selected gemstones by our expert gemologists, we want to add a new dimension to jewelry design service in which we are savvy. From preset settings, ‘make your own’ pieces to custom jewelry design, we create the personalized jewelry of your dreams.