The QMJ Group is a privately owned publishing and exhibition business that serves the quarrying, recycling and dimensional stone industries. The QMJ Group's activities include: Trade Exhibitions Hillhead Quarrying, Construction & Recycling Exhibition located at Hillhead Quarry, Harpur Hill, Derbyshire, UK. Next show 22-24 June 2021. The Natural Stone Show, serving the dimensional stone industry, held at ExCel London. Next show 27-29 April 2021. Hard Surfaces, for innovative surface materials and designs, at ExCeL London. Next show 27-29 April 2021. Magazines Quarry Management, published monthly and Natural Stone Specialist, published 10 times per year. On-line Agg-Net - The Aggregates & Recycling Information Network Reference Books Directory of Quarries & Quarry Equipment and Natural Stone Directory Market Research & Consultancy BDS Marketing Websites www.agg-net.com www.hillhead.com www.stoneshow.co.uk www.hardsurfaces.co.uk www.stonespecialist.com www.quarrymanagement.com www.qmj.co.uk