amaranthine vs amethyst

amaranthine

noun
  • A dark reddish-purple colour. 

  • The amaranth flower. 

adj
  • Of a dark reddish purple colour. 

  • Relating to the mythical amaranth flower that never fades. 

  • Unfading, eternal, immortal, infinite. 

  • Relating to, or having the form of plants of the genus Amaranthus. 

amethyst

noun
  • A purple colour. 

  • The tincture purpure, when emblazoning the arms of the English nobility. 

  • A transparent purple variety of quartz, used as a gemstone. 

adj
  • Having a colour similar to that of the gemstone 

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