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 mineral
Ruby and sapphire are both corundum, only color differs
chromium glow
Chromium makes it red and faintly fluorescent
first laser
A ruby rod fired the world's first working laser
hardness
Second only to diamond on the mineral scale
named gem
Latin rubeus simply means red
for instance

ruby programming language — created by yukihiro matsumoto in 1995, widely used for web development with rails framework

hope ruby — 138.63-carat burmese ruby, one of the world's most valuable gemstones, housed in smithsonian institution

ruby slippers — dorothy's magical shoes in the wizard of oz (1939 film), iconic red footwear in american cinema

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