How are diamonds extracted from kimberlite?
The kimberlite is extracted in enormous quantities using huge trucks and giant steam shovels; the pipe is mined from the surface as an open pit. When it gets too deep, underground mining may begin. Because of the huge quantities of rock involved, the mining is highly mechanized.
What gemstones are found in kimberlite?
It is a mica peridotite, and its most abundant mineral constituent is olivine. Other abundant minerals include phlogopite mica; chromium- and pyrope-rich garnet phenocrysts; chrome-bearing diopside, particularly in the African kimberlite; ilmenite; serpentine; calcite; and magnetite.
What does a diamond look like when it’s found?
Diamonds found at the Crater are typically smooth and well rounded. Their shape resembles a polished stone with smooth sides and rounded edges. Size: The average size of a diamond is about the size of a paper match head, approximately 20-25 points weight.
How do miners find diamonds?
Horizontal marine diamond mining uses a crawler to suck gravel from the ocean floor to the surface via flexible pipes, while vertical diamond mining uses a large, ship-mounted drill to pull up the diamond-bearing gravel.
How far down is kimberlite?
Kimberlitic magmas form about 150 km below Earth’s surface, i.e. at much greater depths than any other volcanic rocks. The temperatures and pressures at such depths are so high that carbon can crystallize in the form of diamonds.
Are diamonds found in Obsidian?
Kimberlite pipes are the most major source of diamond. Occasionally, varieties of volcanic glass, obsidian, are cut and fashioned as gemstones.