Definition
Origin
Discoverer
Etymology
Class
Sub-Class
Group
Other Categories
Claystone is a fine-grained, dark gray to pink sedimentary rock which mainly consists of compacted and hardened clay
From English clay and stone as the rock contains more amount of clay
Durable Rock, Medium Hardness Rock
Fine Grained Rock, Opaque Rock
Teschenite is coarse- to fine-grained, dark-coloured intrusive igneous rock that usually occurs in sills, dikes and irregular masses and is always altered to some extent
From its occurrence near Teschen. now known as Cieszyn, Pol., Scotland
Coarse Grained Rock, Opaque Rock