10 Marble – metamorphic rock (rock changed by heat or pressure) Marble is made from limestone that has been heated to change it into marble.It is very heavy.It is often white and has coloured swirls and streaks.heavylightUses:SculpturesBuildingsStatuesChopping boardsTilesIt is easy to polish and make the surface smooth and shiny.It is easy to carve because it is soft and doesn’t crumble when cut.
11 Slate – metamorphic rock (rock changed by heat or pressure) Slate is made when mudstones called shale are changed by heat and pressure.Slate is blue, purple and grey in colour.Slate is waterproof.The crystals that the slate is made from are arranged in layers.Uses:Roof and floor tilesWallsDecorative gravelGravestonesIt is easy to cut into thin sheets due to its layers.
27 LimestoneIt is a sedimentary rock.It is formed from the shells of sea animals.It may contain remains of fossils.It is used in buildings and to make cement.It is heavy.It corrodes.
28 SandstoneIt is a sedimentary rock.It is made of sand-sized grains of similar sizes.It can be many colours, but is often reddish brown.It feels rough.It is easy to carve.It can crumble.It can be used to sharpen tools.
29 ShaleIt is a sedimentary rock.It is made of very fine rounded grains.Fossils are often found in it.It forms layers which can be split into thin sheets.It can be used to make tiles.It is formed in lakes.
30 ChalkIt is a sedimentary rock.It is formed from the shells of a particular sea animal.It is white.It is porous.It is used to write on blackboards.
31 ObsidianIt is an igneous rock.It is formed by magma cooling quickly.It is dark and shiny like glass.It is used to make very sharp knives.
32 GabbroIt is an igneous rock.It has large interlocking crystals.It is usually dark grey.It can be used for paving stones.It is rough.It can be found in mountainous areas.
33 BasaltIt is an igneous rock.It has small interlocking crystals.It is dark grey and very hard.It sometimes forms columns of stone as it hardens.It turns red when it weathers.
34 GraniteIt is an igneous rock.It has interlocking crystals.It is formed by magma cooling slowly, so it has large crystals.It is used for kitchen worktops because it is so hard.It is heavy.
35 MarbleIt is a metamorphic rock.It is formed from limestone.It can be many colours but is often white with streaks in it.It is used for making statues and chopping boards.It is heavy.
36 SlateIt is a metamorphic rock.It is formed from shale.Its crystals are arranged in layers.It is used to make roof tiles.It can be blue, purple and grey.
37 GneissIt is a metamorphic rock.It is formed from sedimentary and igneous rocks.It is formed under pressure.It has alternating bands of colours.It is rough to touch.It sparkles.
38 SoapstoneIt is a metamorphic rock.It is quite a soft rock.It is used for making bowls and other objects with carvings.It feels smooth and slippery.It has a high resistance to heat.