The all-new MJSA Showcase Rhode Island: Equipment, Technologies, Supplies & Services show will run Sept. 29-30 at the Crowne Plaza in Warwick, Rhode Island. Rhode Island's roots in jewelry manufacturing run deep, and the state is home to the industry's finest jewelry manufacturers, designers, contractors, and trade suppliers. MJSA Showcase: Rhode Island aims to celebrate this heritage by showcasing the industry's finest providers of equipment, technologies, supplies, and services.