Sand

Auckland's biggest supplier of sand for concrete is appealing a decision to stop taking it from Pakiri Beach.

McCallum Bros has been sucking up sand from three different depths, but Auckland… Video, Audio

Silicon dioxide, the raw material found in sand, is an earth abundant resource. However, beach and riverbed sand, isn't the only source of silicon dioxide and this is where the potential lies. Dr Erin… Audio

Sand is the most extracted solid material in the world with 50 billion tonnes mined a year, used for everything from roads and buildings to mobile phones - and we’re running out.  Investigative… Audio

Tonny Brinkman is a 93-year-old sand fan who has donated her collection of thousands of different sands from all over the world to the Auckland War Memorial Museum. Curator Hugh Grenfell talks us… Audio, Gallery

David Owen explores the global business of sand in a rather worryingly titled New Yorker article 'The World is Running Out of Sand'. Audio