Grenada Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Costa Rica was US$201 during 2015, according to the United Nations COMTRADE database on international trade. Grenada Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Costa Rica - data, historical chart and statistics - was last updated on May of 2024.