Sparklers2 May 2018 10:51
While we're hanging around bored waiting for more news I thought I'd revisit the Zimbabwe diamonds situation. A few points of interest arose which might help cheer us all up:
- Marange Diamond Fields is reckoned to be holding one of the World�s largest deposits.
- The deposit is huge, the field covers about 400sq miles, forming a bowl-like profile whereby the edges/rim offered easy pickings until now, but is now quite depleted. However the deeper conglomerate rock sections are where the really interesting stuff lies, but require investment in equipment and specialist knowledge to extract.
- In terms of carats produced, the Marange field is potentially the largest alluvial diamond producing project in the world, estimated to have produced 17 million carats in 2014. Due to quality (on average slightly lower than most) and distribution issues, the average value per carat is reckoned to be circa $50, about half the global average price (I haven't found anything more recent yet).
- I'm no expert but am told that a good method of quantifying the value of a deposit is to measure carats per 100 tonnes of ore. It is claimed that Marange can produce 4 000 carats per 100 tonnes. The numbers for Zimbabwe�s two kimberlite sites, Rio Tinto�s operation in Murowa and River Ranch, are much lower, averaging 60-80 carats and 25-30 respectively.
- While the bulk of Marange diamonds are of industrial grade quality, it is anticipated that the top five percent are �very serious gems� while another five percent are �decent quality�.
- Until recently, the diamond fields were operated by 7 private entities all of which are partnered with the Zimbabwe government. None have shown ability or willingness to fund the investment required to develop the deeper mines.
- The resource has seen little or no investment in recent times, having been exploited for the personal enrichment of third parties. The Zim Government apparently wants the field to be properly worked to provide fair returns for the people of Zimbabwe and to provide returns to the much-needed investors. But it can't do it on its own and needs external practical and financial investment and it's reluctant for historical reasons to go to the big players.
Hence the potential for VAST/BOD.
- It is reckoned that Marange�s output could potentially sustain three million carats a month for 14 years. Even at $50/carat that's a hell of a lot of diamonds...!