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.
Biotite. Biotite is a member of the mica branch of the silicate mineral group. It is common as a rock-forming mineral and is found associated with muscovite, feldspar, and quartz. It has a widespread occurance and is present in all three rock types igneous, metamorphic, and sedimentary. It is classified as a Phyllosilicate.