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The primary reservoir of all naturally occurring diamonds and chromium ore, peridotite is an economically important resource. The rock, which is also a frequent host of platinum metals and talc deposits, can be found worldwide, but is particularly prevalent in New Zealand and the United States, where notable occurrences exist in New York, Arkansas, Georgia, Kentucky, and the Carolinas. The location that may retain one the most valuable instances of peridotite, however, is the Kimberley district of South Africa. In this area, the peridotite, typically referred to as kimberlite, contains the only diamonds known to occur in the matrix of their original formation.

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