Photo by Subarcticmike
The other source of diamonds during antiquity was from western
Borneo where they are found in alluvial deposits of Eocene age. Most of the stones found in these deposits are small and of poor quality. These diamonds are still being mined mainly by artesianal methods under primitive methods. To this day nobody has ever discovered the primary source of these diamonds.
During the post World War II period extensive deposits of diamonds were discovered in the
Soviet Union by tracing a special type of pyrope garnet that is in high in chromium to its source. The source was found in kimberlite pipes in Siberia. Several mines were opened causing the Soviet Union to become one of the world’s largest producers of diamonds.
After the discoveries in the
Soviet Union the scene shifted to where a new type of deposit was discovered in a type of rock called lamproite. This has resulted in the development of the largest diamond mine on earth, the Argylle Mine. Some pf the diamonds found in this mine are colored purple an extremely rare type of diamond. Australia
The diamond discoveries in the
Soviet Union and led to the discovery of kimberlite deposits in Australia , Canada and Brazil . There are also deposits producing diamonds in India and eastern Arkansas and Colorado . Wyoming