Definition
Jasperoid is a rare, peculiar type of metasomatic alteration of rocks
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar
History
Origin
USA
-
Discoverer
Unknown
Alexandre Brongniart and René Just Haüy
Etymology
From silica, the main mineral content of Jasperoid
From Greek trakhus rough’ or trakhutēs roughness
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Volcanic
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock