ruby
noun.
a transparent piece of ruby that has been cut and polished and is valued as a precious gem
noun.
a transparent deep red variety of corundum; used as a gemstone and in lasers
noun.
a deep and vivid red color
Synonym: crimson, deep red
adj.
of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies
Synonym: ruddy, ruby-red, reddish, red, crimson, cherry-red, cherry, cerise, carmine, blood-red, scarlet