Diamond Mining Facts
By Maury Kauffman
4/21/2016 at 9:02 AM
- About 1 ton of dirt must be moved to discover one half carat of diamond rough.
- 80% of diamond rough located is considered "industrial quality" that is, not good enough for jewelry. It is used for cutting and grinding.
- It costs $10 million to simply identify a location for a mine and then $1 billion to open it.
- Fewer than 1% of all mine deposits located in the last 25 years have contained enough rough diamonds to make mining economically viable.