Check the listing for details. Amphibolite, a type of Metamorphic Rock. Condition: Used. Listed at 15.00 USD. Amphibolite is a type of metamorphic rock that forms through the alteration of pre-existing igneous or sedimentary rocks under high pressure and temperature conditions. It is characterized by the presence of amphibole minerals, such as hornblende or actinolite, which give it its distinctive texture and appearance. Amphibolite is commonly found in mountain ranges and is often used as a decorative stone due to its unique properties and colors. Amphibolite is an often coarsely-speckled metamorphic rock that contains primarily amphibole and plagioclase feldspar (the former is dark, often black, and the latter is white). Because it is hard, takes a polish well, and sports a handsome pattern, Amphibolite is commonly used for paving stones or building facades.