Earth -- Rocks and their minerals -- How rocks are formed -- Weathering and erosion -- Rocks on the seashore -- Igneous rock -- Volcanic rock -- Sedimentary rock -- Limestone -- Metamorphism -- Marble -- The first flint tools -- Rocks as tools -- Pigments -- Building stones -- The story of coal -- Fossils -- Space rocks -- Minerals -- Crystals -- Crystal growth -- The properties of minerals -- Gemstones -- Decorative stones -- Other gems -- Ore minerals -- Precious metals -- Cuttig and polishing -- Starting a collection -- Did you know? -- Rock or mineral? -- Find out more.