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.
They appear to form as magmas rising through bodies of peridotite or gabbro react with these rocks. Websterite is the name for a pyroxenite of mixed Opx and Cpx. If hornblende is present to a notable extent in any of these rocks, hornblende can be added in front of the rock name. All of these rocks are commonly altered to serpentinite.