Jubilee Enterprise Plc, in celebration of its 89th anniversary, will present more than 20,000 precious pieces worth over a billion baht at the “Jubilee Diamond Mid Year Expo 2018,” the grand festival for diamonds and diamond jewelleries, to be held from June 21 to 24, 10 am-8 pm daily, at the Grand Ballroom of Bangkok Marriott Hotel in Surawongse.