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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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∙ 13y ago
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What is a gem of animal origin?
I believe it means a gem that is made by animals. Such as a pearl.
Is a gem a rock?
A gem is considered any attractive mineral or rock which when cut and polished, may be used for ornamentation. A gem can be either a mineral or a rock, but most gems are minerals. A rock is an aggregate of many minerals, with no specific structure, while a mineral has a much more ordered atomic structure, with specific physical and chemical properties. A gem is not necessarily a crystal; lapis lazuli is not a mineral or a crystal, yet can still be considered a gem due to its desirable color and traits when polished.
Is a sapphire a rock or a mineral?
Sapphire is gem quality corundum, which is a mineral.
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 oyster gem?
pearl
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:beautydurabilityrarityportabilityand among other things..Submitted answer does not answer the question nor is it correct. All Gems are not minerals. A Gem is a piece of rock or mineral, which, in cut and polished form, is used to make jewelry or other adornments.
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.
What is a highly priced mineral?
Gem
