Assertion: coral's color | /r/HasProperty | ruby
Facets:
Source sentences:
text: Corundums of any other color (except red, which is ruby) are known as "fancy sapphires.
text: Sapphire is corundum that comes in all colors but red, otherwise known as ruby.
text: This September birthstone can occur in any color except red (which is ruby), but its classic and most well-known hues are blue to violet.