Definition
Origin
Discoverer
Etymology
Class
Sub-Class
Group
Other Categories
Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase
From Finnish Rapakivi which stands for crumbly rock
Coarse Grained Rock, Opaque Rock
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