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Opal and amber are not minerals.

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Q: What gem is not a mineral?
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Related questions

Can a gem be a mineral?

Yes, like the mineral Quartz is also a gem.


Is a dimand a gem a mineral or an ore?

Diamond is a mineral and a gem. The main ore of diamond is called kimberlite.


Is gypsum a gem?

its an mineral


What gem mineral is an oxide of aluminum?

Ruby and sapphire are both gem varieties of the mineral corundum, an aluminum oxide.


Are dimoands a mineral or a rock?

a diamond is a mineral (also is a gem)


What is in a sapphire gem?

A sapphire gem is mainly composed of the mineral corundum and other trace mineral impurities that give it its color.


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Yes.


Is nickel a gem?

No, nickel is a mineral.


What is the gem or mineral of New Jersey?

The New Jersey state gem is the Natrolite


What is Youkons known gem?

If you mean gem as in a great thing, then Youkon's known gem in potatoes. The mineral gem, however, is gold.


What is the web address of the Houston Gem And Mineral Society in Houston Texas?

The web address of the Houston Gem And Mineral Society is: http://www.hgms.org