Diamonds mined in 2013 total 14 bn USD. How do they compare with other mineral commodities?

Rather than using somebody else’s compilations, I prefer to check values published by (commodity) specialised international organisations or public companies (OPEC, World Gold Council, KPCS, USGS, etc.). After some work, I have arrived to the estimates presented in the table to the left.

Is the ranking surprising? Any obvious error on the table’s values? Comments and suggestions (always) welcome. Yes, reality changed a lot since 2013 (only 18 months ago).