Hornblendite

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What Wikipedia says

Hornblendite is a plutonic rock consisting mainly of the amphibole hornblende. Hornblende-rich ultramafic rocks are rare and when hornblende is the dominant mineral phase they are classified as hornblendites with qualifiers such as garnet hornblendite identifying a second abundant contained mineral.

Excerpt from the Wikipedia article “Hornblendite”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Piotr Sosnowski, CC BY-SA 4.0, via Wikimedia Commons.