Definition
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
History
Origin
Italy
Hawaii Islands
Discoverer
Marcus Vitruvius Pollio
Unknown
Etymology
From Italian travertino a kind of building stone, from Tiburs, adjective from Tibur (Tivoli), in Italy
From Greek pikros bitter + -ite, 19th century
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock