Definition
Origin
Discoverer
Etymology
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Other Categories
Hornblendite is a type of igneous plutonic rock consisting mainly of amphibole hornblende and is a type of Amphibolite rock
From German, Horn horn + blende
Coarse Grained Rock, Medium Grained Rock, Opaque Rock
Novaculite is a dense, hard, fine-grained, siliceous metamorpic rock which is a type of chert that breaks with conchoidal fracture
From Latin word novacula, for razor stone
Fine Grained Rock, Opaque Rock