verb. 1  To take (the property of another) without right or permission. 2  To present or use (someone else's words or ideas) as one's own. 3  To get or take secretly or artfully: steal a look at a diary; steal the puck from an opponent. 4  To give or enjoy (a kiss) that is unexpected or unnoticed.
Peridotite is a coarse-grained, dark-colored intrusive igneous rock, which consists of minerals such as pyroxene and olivine. It usually contains olivine as the primary mineral in addition to other mafic minerals, such as amphiboles and pyroxenes. It is very low in silica and high in magnesium.
Best Answer: Usually, very dark igneous rocks are mafic rocks that have been formed deep underground. They include gabbros and peridotite. They have very little silica content (which gives them the darker colour and a lot of iron and magnesium.They are usually denser than the felsic rocks with high silica content.est Answer: Usually, very dark igneous rocks are mafic rocks that have been formed deep underground. They include gabbros and peridotite. They have very little silica content (which gives them the darker colour and a lot of iron and magnesium. They are usually denser than the felsic rocks with high silica content.