Amphibolite
Introduction: This rock has been produced by regional metamorphism. It has been subjected to intense heat and pressure deep in the Earth's crust.
Distribution: Amphibolite is found in broad belts, such as the matchless amphibolite belt in central Namibia.
Composition: Amphibole minerals such as hornblende.
Colouration: Light green to black.
Uses: Crystals are used in jewellery.
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