please anwer

Asked by  | 1st 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  | 2nd Dec, 2008, 03:24: AM

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