the.com/ruby
a sapphire that simply chose violence and went red instead.
means A precious gemstone of deep red color, a variety of the mineral corundum prized in jewelry.
from From Latin 'rubeus' meaning 'red,' itself rooted in 'ruber' (red) — the same family that gives us 'rubric' and 'rubella.' It reached English through Old French 'rubi.' Fittingly, the stone is chemically a sibling of sapphire (both are corundum); the red simply comes from a pinch of chromium, so the name marks the one trait that sets it apart: its redness.
same mineralRuby and sapphire are both corundum, only color differs
chromium glowChromium makes it red and faintly fluorescent
first laserA ruby rod fired the world's first working laser
hardnessSecond only to diamond on the mineral scale
named gemLatin rubeus simply means red