kimberlite
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Kimberlite from Finland.
Photo by Siim Sepp; source: Wikipedia
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A basic igneous rock, often altered and
fragmented, which contains diamonds formed
in situ. Kimberlite consists of olivine
with mica, serpentine,
calcite, and other minerals. Its chief occurrences
is as pipes and dikes at Kimberley, South Africa.
Related category
GEOLOGY
AND PLANETARY SCIENCE
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