green-blue vs turquoise

green-blue

turquoise

adj
  • Having a pale greenish-blue colour. 

  • Made of turquoise (the gemstone). 

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

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

  • turquoise 

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