“Then the Guardian of the Gates put on his own glasses and told them he was ready to show them to the Palace. Taking a big golden key from a peg on the wall, he opened another gate, and they all followed him through the portal into the streets of the Emerald City.
11. The Wonderful City of Oz Even with eyes protected by the green spectacles, Dorothy and her friends were at first dazzled by the brilliancy of the wonderful City.
The streets were lined with beautiful houses all built of green marble and studded everywhere with sparkling emeralds. They walked over a pavement of the same green marble, and where the blocks were joined together were rows of emeralds, set closely, and glittering in the brightness of the sun.”