Definition
Borolanite is a variety of Nepheline Syenite and belongs to igneous rocks and contains nepheline-alkali feldspar pseudomorphs which occur as conspicuous white spots in the dark rock matrix
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
History
Origin
Scotland
Italy
Discoverer
Unknown
Marcus Vitruvius Pollio
Etymology
From Alkalic Igneous complex near Loch Borralan in northwest Scotland
From Italian travertino a kind of building stone, from Tiburs, adjective from Tibur (Tivoli), in Italy
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
-
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock