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Service OnlineDiabase ( / ˈ d aɪ. ə b eɪ s /) or dolerite or microgabbro is a mafic holocrystalline subvolcanic rock equivalent to volcanic basalt or plutonic gabbro.
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Service OnlineQuartz is one of the most common minerals found in the Earth s crust. If pure quartz forms colorless transparent and very hard crystals with a glass-like luster. A
Service OnlineQuartz is one of the most common minerals found in the Earth s crust. If pure quartz forms colorless transparent and very hard crystals with a glass-like luster. A
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Service OnlineAssociation of rubidium and potassium and their abundance in common igneous rocks and meteorites ☆
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