An area of kitchen design that is growing fast is the use of stone and marble in the room, an expert has suggested.Steve Bristow of Steve Bristow Stone Masonry has claimed that interest in these materials to be used in new kitchen designs is continuing to go up.He observed that the versatile, beautiful and durable nature of marble and stone is making them the choice for discerning kitchen designs as they add a wow factor.The use of marble and stone is one which is becoming increasingly popular both in contemporary and period style interiors, he said.Natural stone has a timeless appeal and will never go out of fashion it is also incredibly easy to maintain making it a practical and stylish choice for kitchens.However, granite is the biggest seller in the kitchen for Mr Bristow. He noted that it is being used for walls and work surfaces in order to bring a stylish touch to the room.