abrasive

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Substance used for cutting and polishing or for removing small amounts of the surface of hard materials. There are two types: natural and artificial abrasives, and their hardness is measured using the Mohs scale. Natural abrasives include quartz, sandstone, pumice, diamond, emery, and corundum; artificial abrasives include rouge, whiting, and carborundum.

Green stands for the country's natural resources. White represents peace, justice, and unity. Blue recalls the sea and the capital Freetown's natural harbour. Effective date: 27 April 1961. >>