Lamprophyre is the name of the rock type instersected on the Shire target. There was visible quartz in the core which ruled out kimberlite from the beginning but the rock in some respects looked a lot like kimberlite and had the same feel. <A HREF="http://www.google.ca/search?hl=en&ie=UTF-8&oe=UTF-8&safe=off&q=lamprophyre+diamond&meta=" target="_new">http://www.google.ca/search?hl=en&ie=UTF-8&oe=UTF-8&safe=off&q=lamprophyre+diamond&a...</A>