kimberlite

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun a rare type of peridotite that sometimes contains diamonds; found in South Africa and Siberia

From Kimberley + -ite, from the name of the South African town of Kimberley where the mineral was first found.

The diamonds at Kimberley are found in a blue earth, technically known as kimberlite and commonly called "blue ground." — An African Adventure, Isaac Frederick Marcosson

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