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Why are rubies red and emeralds green? Their colors come from the same metal in their atomic structureBoth rubies and emeralds are minerals, which is a type of rock with a consistent chemical ... Rubies are mainly made up of the mineral corundum, which is composed of the elements aluminum and ...
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A blue miracle in the Eifel: How sapphires formed in volcanoesWhy this extremely rare variant of corundum is frequently found in this ... They found a portion of these millimeter-sized crystals in rock samples collected from volcanic deposits in the numerous ...
Both rubies and emeralds are minerals, which is a type of rock with a consistent chemical ... Rubies are mainly made up of the mineral corundum, which is composed of the elements aluminum and ...
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