The shape of jeweller's borax is

Chemically borax is :

Chemically borax is

Different sized pearls are separated by jewellers by the process of ______ .

Anhydrous borax is:

A diamond cutter uses a jeweller's lens to eamine a diamond.If the focal length of the lens is 16 cm ,what is the maximum angular magnification fo the diamond?

The chemical formula of borax is

Borax is an important compound of Boron. The solution of borax is alkaline. Give a reason.