Muscovite mica will peel off in flat sheets. This is an example of the physical characteristic called ____.

Calcite will scratch gypsum. This is an example of the physical characteristics called ____.

The properties of being ____ make a diamond a gemstone.

If the cost of separating a mineral from waste rock becomes too great, the mineral may no longer be classified as an ore. This happens because ____.

A gem is _________ and _________

color of a powdered mineral

how light is reflected from a mineral

the tendency of a mineral to break along a smooth, flat surface

the tendency of minerals to break with rough or jagged surfaces

minerals mined because they contain useful substances

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