Science
Chemical Composition of Gemstones, 16 Formulas and Colours
Ruby and sapphire share one formula, Al2O3, as do emerald and aquamarine.
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Ruby and sapphire share one formula, Al2O3, as do emerald and aquamarine.
This Compound Interest chart shows 40 functional groups in organic chemistry, from alkanes and alcohols to sulfonic acids and phosphines.
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