Grenada Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Guyana was US$100 during 2016, according to the United Nations COMTRADE database on international trade. Grenada Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Guyana - data, historical chart and statistics - was last updated on June of 2024.