Washington [US], July 4 (ANI): As the United States celebrates its 250th anniversary, President Donald Trump expressed his gratitude for the 321 diamonds, 56 sapphires, 13 emeralds and six rubies encrusted watch-sized gold gifted to him by Antwerp World Diamond Centre, Belgium. In a prerecorded video message delivered during the celebration of 250 years of independence in Brussels, the President hailed the gift