emerald green vs turquoise

emerald green

noun
  • A rich green colour, like that of an emerald. 

  • A durable vivid green pigment made from copper arsenate. 

adj
  • Of a rich green colour, like that of an emerald. 

turquoise

noun
  • A pale greenish-blue colour, like that of the gemstone. 

  • A sky-blue, greenish-blue, or greenish-gray semi-precious gemstone. 

  • turquoise 

adj
  • Having a pale greenish-blue colour. 

  • Made of turquoise (the gemstone). 

How often have the words emerald green and turquoise occurred in a corpus of books? (source: Google Ngram Viewer )