Definition
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption
It is a metamorphic magnesium rich rock because it is composed of the mineral talc
History
Origin
Italy
USA
Discoverer
Unknown
Unknown
Etymology
From a Latin word tophous then in Italian tufo and finally tuff
From 17th century, because of its greasy feel and use like a soap
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock
Family
Group
Volcanic
-
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock