Definition
Origin
Discoverer
Etymology
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Other Categories
Larvikite is an igneous rock and a variety of monzonite, notable for the presence of thumbnail-sized crystals of feldspar
From the town of Larvik in Norway, where this type of igneous rock is found
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Chert is a hard, dark, opaque sedimentary rock which is composed of silica with an amorphous fine-grained texture
From flint-like quartz, 1670s, of unknown origin- a local term, which has been taken into geological use
Fine Grained Rock, Opaque Rock