1 Definition
1.1 Definition
Jasperoid is a rare, peculiar type of metasomatic alteration of rocks
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite
1.2 History
1.2.1 Origin
1.2.2 Discoverer
1.3 Etymology
From silica, the main mineral content of Jasperoid
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy
1.4 Class
Sedimentary Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
1.6 Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Medium Grained Rock, Opaque Rock