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rocks and minerals

QuestionAnswer
cleavage the natural splitting of certain rocks
crystal a solid body having a characteristic internal structure and enclosed by symmetrically arranged plane surfaces, intersecting at definite and characteristic angle
fracture the way in which a mineral or rock naturally breaks
gem precious stone
hardness A measure of how easily a mineral can be scratched.
luster the state or quality of shining by reflecting light
magma molten material beneath or within the earth's crust, from which igneous rock is formed.
mineral any of a class of substances occurring in nature
ore a mineral or natural product serving as a source of some nonmetallic substance, as sulfur.
silicate any of the largest group of mineral compounds
specific gravity the ratio of the density of any substance to the density of some other substance taken as standard
streak the line of powder obtained by scratching a mineral or rubbing it upon a hard
basaltic dense igneous rock of a lava flow or minor intrusion
cementation the process of heating a solid with a powdered material to modify the properties of the solid
compaction the consolidation of sediments resulting from the weight of overlying deposits.
Created by: lorene
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