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Why are rubies red and emeralds green? Their colors come from the same metal in their atomic structure
Even the color of blood comes from the protein hemoglobin ... Rubies are mainly made up of the mineral corundum, which is composed of the elements aluminum and oxygen in a regular, repeating ...
National Geographic news7y
Minerals and Gems
Rubies are formed of a mineral called corundum, comprised of aluminum oxide. The red color is caused by traces of chromium. Corundum also forms sapphire in many colors, which generally come from ...
Atlanta Journal-Constitution27d
Why are rubies red? Chemistry.
Even the color of blood comes from the protein hemoglobin ... Rubies are mainly made up of the mineral corundum, which is composed of the elements aluminum and oxygen in a regular, repeating ...