Science Focus - the home of BBC Science Focus Magazine
Can you turn glass back into sand? © Getty Images

Can you turn glass back into sand?

Subscribe to BBC Science Focus Magazine and get 6 issues for just £9.99

A calm walk along the beach doesn't sound as pleasant with glass underfoot!

Asked by: Jodie Appleton, New Zealand

Advertisement

Finely crushed glass is basically a very pure form of sand. Technically, natural sand is made of quartz crystals of silicon dioxide, whereas glass is the non-crystalline, amorphous form of silicon dioxide. But when it is ground down enough, the difference isn’t obvious.

Crushed glass is sold as an alternative to sand for pool filters – in fact, recycled crushed glass has been considered as a partial replacement for the sand on some of Florida’s eroding beaches.

Read more:


Advertisement

Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.

Authors

luis villazon
Luis VillazonQ&A expert

Luis trained as a zoologist, but now works as a science and technology educator. In his spare time he builds 3D-printed robots, in the hope that he will be spared when the revolution inevitably comes.

Advertisement
Advertisement
Advertisement

Sponsored content