Prospector's Guide to Diamonds

Diamonds are a Geologist's Best Friend

KIMBERLITE

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Posted by diamondprospector on June 28, 2009 Full Size| Slideshow

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2 Comments

Reply diamondprospector
12:56 PM on July 9, 2009 
Hi Kurt,
Kimberlite is not easy to identify - many researchers have made many mistakes in identification and whole books have been written about methods to identify. So, I'm sorry to say, this is just too complex of a question to answer - recommend reading a book on kimberlite - one of the better books was written by Eric Bruton entitled "Diamonds" many years ago.

Not all kimberlites have gems associated with them. Statistics suggest that only about 10% have diamonds but this is an archaic estimate and I would suspect that about 50% have diamonds. The other gemstones are common in most kimberlites, but not all. There are no statistics on the associated gemstones (chromian diopside, pyrope, etc) since it is extremely rare for any diamond company to even consider these in mining. Not sure why, but companies all throw these away and they end up in mine tailings.
Reply Kurt
1:32 AM on July 9, 2009 
What characteristics does this rock have that allows you to identify it as kimberlite? Do all kimberlites have other gems associated with them?