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  • Ruby and sapphire are impure forms ofOption: 1 <img alt="\begin{aligned} & \mathrm{CaF}_2 \text{ and }\mathrm{Fe}_2 \mathrm{O}_3 \textup{ respect

Ruby and sapphire are impure forms of

Option: 1

\begin{aligned} & \mathrm{CaF}_2 \text{ and }\mathrm{Fe}_2 \mathrm{O}_3 \textup{ respectively}\\ \end{aligned}


Option: 2

\begin{aligned} & \mathrm{Al}_2 \mathrm{O}_3 \text { and } \mathrm{Ca}\mathrm{F}_2 \textup{ respectively}\\ \end{aligned}


Option: 3

\begin{aligned} & \mathrm{Fe}_2 \mathrm{O}_3 \\ \end{aligned} \text { and } \begin{aligned} & \mathrm{Al}_2 \mathrm{O}_3 \text { respectively } \end{aligned}


Option: 4

\begin{aligned} & \mathrm{Al}_2 \mathrm{O}_3 \text { and } \mathrm{Fe}_2 \mathrm{O}_3 \text { respectively } \end{aligned}


Answers (1)

best_answer

Both ruby and sapphire are forms of \mathrm{Al}_2 \mathrm{O}_3 with impurities \mathrm{\mathrm{Cr}\: and \: Co} respectively.

The colour of these gemstones may be attributed to the presence of these impurities.

Posted by

Divya Prakash Singh

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