Definition
Origin
Discoverer
Etymology
Class
Sub-Class
Group
Other Categories
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
From Job Charnock, an administtrator of East India Company
Coarse Grained Rock, Opaque Rock
Tachylite is a vitreous form of basaltic volcanic glass. This glass is formed naturally by the rapid cooling of molten basalt
From German Tachylite, from tachy- + Greek lutos soluble, melting
Durable Rock, Medium Hardness Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock