| 21. | "Kimberlite " is a type of rock which sometimes contains diamonds.
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| 22. | He meant Stewart, with Kimberlite Pipe, and Barnett, with Answer Lively.
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| 23. | And that ton of kimberlite will yield just a single carat, on average.
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| 24. | Stewart made his Derby debut in 1999 with Kimberlite Pipe, who finished sixth.
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| 25. | The project is for a kimberlite mine 150 meters ( 500 feet ) deep.
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| 26. | The Cullinan kimberlite was discovered in 1902 and in 1903 open pit mining commenced.
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| 27. | Garnet harzburgite xenoliths from kimberlites in South Africa have been particularly well-characterized.
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| 28. | The first kimberlite deposit, Zarnitsa mine, was discovered on 21 August 1954.
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| 29. | It was emplaced during a period of kimberlite volcanism in the Late Cretaceous epoch.
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| 30. | The article isn't clear about the relationship between kimberlite and diamond ore.
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