Definition
Pumice is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
History
Origin
Spain
Germany
Discoverer
Unknown
Christian Leopold von Buch
Etymology
From Old French pomis, from a Latin dialect variant of pumex
From Latin glaber bare, smooth, bald
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
Plutonic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock