The most up-to-date information about vendors, news, and weather for the Spring NYC Mineral & Gem Show. Check out the show's floor plan and the products that will be sold. The Spring NYC Mineral & Gem Show starts on 3/7/2020. The Show ends on 3/8/2020. The Show is located at: Watson Hotel, Manhattan Grand Ballroom The Watson Hotel 440 W 57th St, New York City, New York 10019, United States.