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Waste and Recycling
Sunglasses

What are glass made of?

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February 16, 2016 1:46PM

Glass, as the term is commonly used, is an amorphous solid made up of silicon dioxide (silica), sodium oxide (Na2O), calcium oxide (CaO), and other additives in small quantities which will modify its colour, strength, refractive properties at selective wavelengths and so on.