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Kimberlites and lamproites are volcanic rocks that usually consist of diamond fragments. Ages ago, before they hardened into rock, the sped up from the bowels of earth, carrying the priceless gems within them. And so we can access the riches in the guts of the earth. The liquid form of igneous rocks is called magma. When heated to impossible temperatures and pressure, they find cracks in the bowels and ascend to the earths surface. It is the birthing of diamonds because the processed stones in the earths belly are brought up as such. Otherwise, the jewels would have remained myths, living only in the minds of those who dared dream that far out. After eruption, molten magma from the earths crust solidifies and forms the rocks that we know today. If they have passed through diamond sites in the bowels, they will carry pieces of the precious stones in them. This is where we find them, the diamonds, before we process them into the form we love so much. Not all diamonds are mined from their primary sites. Many are recovered at a distance from these deposits. These locations are called secondary alluvial deposits. Not that you would care a lot, since you are able to own the thing and put it on your body to beautify you. There are a number of places you could find diamonds. There are cratons, there are volcanic rocks, and they are waterbeds of streams that flow from volcanic sources. In some instances you find them also in sandstones and conglomerates. Whatever it takes, as long as you can lay your hands on earths most priced precious stone.
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