Smarty Pants Quiz
09
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Emeralds and rubies get their colors from which element?
Rubidium
Mercury
Chromium
Radium
Nope... Try again!
The presence of the chromium impurity makes the colorless corundum crystal red, while the presence of the chromium impurity makes the colorless beryl green.
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09
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00
Emeralds and rubies get their colors from which element?
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