Why are rubies red and emeralds green? Their colors come from the same metal in their ...
The colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green ... Rubies and emeralds are great examples of how a small amount of a transition ...
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Rubies and emeralds get their colours from a common metal
The colours of rubies and emeralds are so striking that they define shades of red and green ... of a transition metal – in this case, chromium – can create a beautiful colour in what ...