magnetite
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likely to be either biotite, amphibole, or magnetite. These minerals are known for their dark color and are commonly found in igneous and metamorphic rocks.
Dolostone is a rock. Dolomite is the mineral often composing dolostone.
Basalt !! :)
Basalt is known as a type of rock. This rock is a dark-colored and fine grained.
Basalt
The igneous rock you are referring to is basalt. It is a fine-grained, dense, and dark-colored rock that forms from low-silica magma rich in iron and magnesium.