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12 Cards in this Set
- Front
- Back
Gems
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a rare mineral prized for their beauty
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gemstone
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a durable and beautiful mineral that can now be cut and polished
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important gems
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rubies are used in laysers, quartz is used in electronics and timepieces, industial diamonds are used to heavy duty drills synthetic diamonds are now indistinguishable from the natual ones
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pearls
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formed from oysters so they are organicly created
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Opals
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lack crystaline structure
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Ores
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minerals or a combination of minerals from which metals or nonmetals can be distracted in usable amounts
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metals and examples
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are minerals or elements that usually have shiny surfaces that are a good conducor of heat and electricity
iron gold and aluminum |
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smelting
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a process in which ore is made so hot that metals of other useful substances may be extracted
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Metals which are not mierals include:
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steel: made with conium and iron
brass: made from copper and Zinc not naturally occuring |
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nonmetals
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have dull surfaces and are usually poor conductors of electricity
ex. sulfer |
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vein minerals
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minerals that will fill up cracks and fractures in a rock. Sometimes they will fill empty spaces caused by collapsed rocks
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titanium and example
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a lightweight, durable metal that can be extracted from two minerals
ilmenite and rutile |