Auckland-based company that operates New Zealand's only perlite (siliceous rock) mine in the centre of North Island; also has a pumice & sand pit there; perlite has applications in cryogenics & horticulture

Suppliers of information & advice on land & minerals; based in Hamilton, with offices in New Plymouth & Nelson; services: crown/local authority land disposal projects, land status & mineral ownership investigations, land surveys etc

Owns and mines a 67-hectare quarry in Otorohanga with deposits of high-grade limestone sufficient to ensure 40 years' supply at full operating capacity; is the country's largest lime producer

Company that mines white primary clay deposits (halloysite) at Matauri Bay; the clay is used for porcelain & bone china

Australasian gold producer with a dominant position in two major historic goldfields (Macraes in Otago and Reefton in South Island) and 100% ownership of a modern day gold discovery in New Zealand (Sams Creek project near Nelson)

Business group operating in the Waikato region; operates a range of businesses that include property development, metal protection, quarrying, sand mining, waste solutions, fertiliser, leisure and entertainment

Company with the permit to develop, mine, and transport coal from the Pike River premium hard coking coal (used in production of coke & steel) deposit on the West Coast of the South Island

Incorporated society whose main activity is to support the explorers and producers of New Zealand mineral resources; based in Wellington; principal minerals produced include coal, ironsands, gold, aggregates & industrial minerals