Complete the grid, then unscramble the letters in the yellow squares to reveal a type of rock. Answer next week.
TO ENTER: Text AWORD then your answer, name and postcode to 65700 (eg AWORD London John Smith W8 5TT). Texts cost £1 plus standard network charge. Or call 0901 292 5090 and leave your answer and details. Calls cost £1 plus your telephone company’s network access charge. Lines close at 11.59pm on Friday. See today’s solutions panel for terms and conditions. December 20 winner: Myra Bowen, of Caldicot, Gwent. Phone/text services Helpline: 0330 1000 601.