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26 Cards in this Set
- Front
- Back
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ratio of its weight compared w/ the weight of an equal volume of water
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specific gravity
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the way a mineral reflects light
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luster
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naturally occuring, inorganic solid w/ a definite chemical composition and an orderly arrangement of atoms
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mineral
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minerals that break w/ uneven, rough, or jagged surfaces
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fracture
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beautiful, rare, highly prized mineral that can be worn in jewlry
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gem
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minerals that contain silicon and oxygen and usually one or more other elements
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silicates
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measure of how easily a mineral can be scratched
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hardness
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physical property of some minerals that causes them to break along smooth, flat surfaces
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cleavage
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a solid, in which thte atoms are arranged in orderly, repeating patterns
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crystal
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cools when it reaches earths surface or if its trapped below the surface
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magma
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color of a mineral when it is in a powdered form
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streak
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what shapes do crystals take?
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depends on have the atoms are arranged
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what shape is a salt crystal?
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cube
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as magma cools, its ____ form a crystal structure and it becomes a mineral.
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atoms
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Minerals are made up of one or more ____
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element
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In the past a mineral has been classified as an ore, what could happen to change that?
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if it is hot mined for a profit
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What is the largest group of rock-forming minerals?
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crystals
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What are some of the softest minerals?
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talc, gypsum
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what is the hardest mineral?
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diamond
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What is cleavage mean?
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minerals that break w/ a smooth flat surace
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what properties make a mineral a gemstone?
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highly prized, rare and beautiful
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If the cost of separating a mineral from waste rock becomes too great, the mineral may no longer be classified as an ore. Why?
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becuz the cost may be more than the profit
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What are the 2 ores of titanium?
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rutile and ilmen
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There are 90 elements that occur naturally in Earth's crust but 98% of the earth's curst is made up of only ___ elements
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8
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there are approx. _____ minerals on earth.
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400
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List the fi ve characteristics all minerals shar!
1 2 3 4 5 |
1 formed in natural process
2 they are and were inorganic 3 solids-definite shape and volume 4-each mineral is an element or compound w/ a chemical composition unique to that mineral 5 arranged in a pattern, repeated over and over.. |
