Question

From where do the gems used in jewelry come A. They are metallic ore B. They are nonmetallic silicates C. They are nonmetallic minerals D. They are metallic minerals

Answer 1

your ans:

gems are generally non metallic minerals which can be mined from earth's crust

Answer 2

Gems are ‘nonmetallic minerals’.

Option: C

Explanation:

• Non-metals are usually those elements which contains vacant electrons and are ready to accept elements so that they can turn into an anion. Carbon in the form diamond is a gem and is the hardest substance.  

• The non-metals make various covalent bond with each other so that the resultant energy required to break the bonds.  

• Also they have high refractive index and so the objects sparkles. But there are various metals which can also form gems like magnesium.  

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