1. Precious metals Gold, silver, platinum 2. Gemstones ( diamonds, Rubies Sapres · Emeralds · Topaz · Lapis Lazuli · Amber · Amethyst · Tourma 3. Base metals ( tin, tungsten, coltan, copper, cobalt, Galena, aluminum, manganese, iron ore, copper, ) 4. Industrial minerals( Bauxite. Bentonite. Diatomite. Feldspar. Gypsum. Kaolin. Mineral sands. ste rock, grate, limestone, marbles Vermiculite, etc. 5. other minerals of interest are rare earth metals.