CBSE Class 9 Answered
please anwer
Asked by | 01 Dec, 2008, 09:02: AM
Expert Answer
The require formula are:
Diamond:C
Sapphire: : Al2O3
Emarald: Be3Al2(SiO3)6::Cr
Ruby: Al2O3::Cr
Answered by | 02 Dec, 2008, 03:24: AM
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