Definition
Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
History
Origin
Germany
Tamil Nadu, India
Discoverer
Van Tooren
T. H. Holland
Etymology
From Greek tephra, ashes from Indo-European base, to burn
From Job Charnock, an administtrator of East India Company
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
Plutonic
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock