1 Definition
1.1 Definition
Granite is a very hard, granular, crystalline igneous rock which consists mainly of quartz, mica, and feldspar and is often used as building stone
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
1.2 History
1.2.1 Origin
1.2.2 Discoverer
Unknown
Marcus Vitruvius Pollio
1.3 Etymology
From Italian granito, which means grained rock, from grano grain, and from Latin granum
From Italian travertino a kind of building stone, from Tiburs, adjective from Tibur (Tivoli), in Italy
1.4 Class
Igneous Rocks
Sedimentary Rocks
1.4.1 Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
1.5 Family
1.5.1 Group
1.6 Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock