Smarty Pants Quiz
09
00
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Emeralds and rubies get their colors from which element?
Mercury
Chromium
Rubidium
Radium
Almost... 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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