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Why is a pearl considered a gem but not a mineral?
Because they're considered pretty and used for jewelry. However, minerals are formed from geological processes, meaning pressures and heat in the ground. Pearls are made from clams.
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How many of the known minerals are considered common?
This is debated, and can be answered a few ways.I think it's safe to say that no more than 300 of the over 4,000 known minerals can really be considered common. The average collector will get to know...
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What qualities must a mineral possess in order to be considered a gem?
All gems are minerals, but not all minerals are gems. In order for the mineral to be classified as a gem, the mineral must have very specific qualities. Minerals are judged on the following: beauty...
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What is gems mineral?
Some gem minerals are beryl's, which make up emeralds and aquamarine, Corundums, which make up rubies and sapphires, and Diamond.
There are other gem minerals out there too, like opal, and gem...
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Can a gem be a mineral?
Yes, like the mineral Quartz is also a gem.