|Granite contains mostly feldspars and ____ minerals.
|Rock that has been liquefied by heat is ____ (melted).
|Mohs scale is used to measure the ____ of a mineral.
|A common igneous rock in the ____ crust is basalt.
|Bituminous ____ is a combustible soft black sedimentary rock.
|Galena and pyrite are minerals with ____ lusters.
|A gray, fine-grained, mafic, volcanic igneous rock is ____.
|Quartz is a mineral with a ____ crystal structure.