Question

Describe the stages involved in the processing of diamonds.

Answer 1

1. The rock bearing diamond is crushed into small pieces.
2. It is then washed to remove dirt.
3. The remaining rock is passed over a rotating table. This table is covered with grease which repels water that is made to flow over it.
4. The wet pieces of rock will not stick to the grease but slide off the table as waste.
5. The diamonds stick to the grease.
6. The rotating table is stopped and grease with the diamond is removed.
7. The process is repeated several times.