12th Centuty : POLISHED QUARTZ - the frist thing we would recognise as sunglasses appeared in China and were made from yhin slices of polished grey quartz. They were used by judges to hide their expressions in court when questioning witnesses
12th Centuty :POLISHED QUARTZ - the frist thing we would recognise as sunglasses appeared in China and were made from yhin slices of polished grey quartz. They were used by judges to hide their expressions in court when questioning witnesses