Definition
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Syenite is a coarse-grained igneous rock which is composed mainly of alkali feldspar and various ferromagnesian minerals
From French syénite, from Latin Syenites (lapis ) (stone) of Syene
Durable Rock, Medium Hardness Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Wehrlite is an ultramafic and ultrabasic rock that is a mixture of olivine and clinopyroxene. It is a subdivision of the peridotites
From the name of a professor, Alois Wehrle
Durable Rock, Medium Hardness Rock
Coarse Grained Rock, Opaque Rock