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22 Cards in this Set

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  • Back
accretion
the enlargement of a crystal by the additional attachment of particles
acid test
a method for testing the composition of such minerals as carbonates and sulfides by their reaction with dilute acids
carat
a unit of weight for gems equal to 0.2 g
cleavage
a property of minerals; tendency to split along certain preferred plains
compound
atoms of several elements combined in a fixed ratio
double refraction
the production of a double image as light passes through certain minerals such as calcite
element
a substance composed entirely of the same kind of atom
flame test
a test to identify a chemical element by its color when heated in a flame
fluorescent
having the property of emitting visible light when exposed to ultraviolet rays
fracture
the characteristic manner in which a mineral breaks when it does not exhibit cleavage
hardness test
the comparative capacity of one substance to scratch or be scratched by another substance
lodestone
a stone that attracts iron as a magnet does
luster
the quality and intensity of light reflected from a mineral's surface
magnetism
the characteristic of attracting iron and certain other materials
mineral
a naturally occurring, inorganic, crystalline solid
mixture
two or more substances mixed together but not chemically combined
Mohs scale
a scale for classifying the relative hardness of minerals
native mineral
a mineral which contains only one kind of atom and is therefore a pure element
organic
containing carbon atoms
phosphorescent
having the property of emitting visible light after removal from a light source
specific gravity
a comparison of the weight of the mineral to an equal volume of water
streak
a mineral identification test made by rubbing a specimen across an unglazed porcelain tile and observing the color of the mark