Diamond Mining and Prospecting
Diamond Mining and Prospecting. ... (chromiumrich magnesium garnet), Crdiopside, magnesiumrich ilmenite (Mgilmenite), and chromite (a type of spinel). ... This is one of the largest holes created by man and much of it was done without the type of modern equipment that we have today. Digging began 1871 and stopped in 1914 This made this a ...