aluminium /al(j)ʊˈmɪnɪəm/
a chemical element. Aluminium is a light, silver-grey metal used for making pans, etc.

ash /aʃ/
(n.) the grey or black powder that is left after something, especially tobacco , wood or coal, has burnt
Example: Everything was burned to ashes.

brick /brɪk/
(n) baked clay used for building walls, houses and other buildings; an individual block of this
Example: The chimney was made of bricks.

cement /sɪˈmɛnt/
(n.) a grey powder made by burning clay and lime that sets hard when it is mixed with water. Cement is used in building to stick stones and bricks together and to make very hard surfaces.
Example: We had to learn how to work with cement.

charcoal /ˈtʃɑːkəʊl/
(n.) a black substance made by burning wood slowly in an oven with little air. Charcoal is used as a fuel or for drawing.
Example: When burnt, charcoal gives off carbon monoxide.

clay /kleɪ/
(n.) a type of heavy, sticky earth that becomes hard when it is baked and is used to make things such as pots and bricks
Example: The soil is mainly clay.

coal /kəʊl/
(n) a hard black mineral that is found below the ground and burnt to produce heat
Example: Coal can be used for cooking.

cotton /ˈkɒtn/
(n) a plant grown in warm countries for the soft white hairs around its seeds that are used to make cloth and thread
Example: My shirt is made from cotton.

fiberglass /ˈfʌɪbəɡlɑːs/
(n.) a strong, light material made by twisting together small threads of glass and plastic, used especially for structures such as cars and boats
Example: It can also be used on fiberglass for polishing stainless steel.

glass /ɡlɑːs/
(n) a hard, usually clear, substance used, for example, for making windows and bottles
Example: I cut myself on a piece of broken glass.

gold /ɡəʊld/
(adj) a chemical element. Gold is a yellow precious metal used for making coins, jewellery, beautiful objects, etc.
Example: The company name was spelled out in gold letters.

gravel /ˈɡrav(ə)l/
small stones, often used to make the surface of paths and roads

iron /ˈaɪən/
(n) a chemical element. Iron is a hard strong metal that is used to make steel and is also found in small quantities in blood and food.
Example: patients with iron deficiency(= not enough iron in their blood)

lace /leɪs/
(n.) a very thin material made from threads of cotton, silk, etc. that are made into a pattern with holes
Example: This outfit may be completed by a hat of lace.

leather /ˈleðə(r)/
(n) material made by removing the hair or fur from animal skins and preserving the skins using special processes
Example: I like this leather jacket.