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3 results for “doré bar refining” in Mining
Mining · 19 August 2026
Nine Grams a Tonne
…n before it. Nine grams a tonne was, not so many decades ago, considered a mediocre grade barely worth developing. Today, a mine averaging even half of that, worked at industrial scale with modern processing technology, can be a perfectly viable and profitable operation — which t…
Amara Okonjo · 20 min read
Mining · 22 May 2026
The Other Supply Chain: Artisanal Mining and the Mercury Problem
…bel does and does not tell you A 'responsibly sourced' claim on a piece of jewellery or a bar most often means the material passed through an audited chain from a specific certified site or pool of sites — not that all artisanal gold everywhere meets that standard, and not that t…
Amara Okonjo · 12 min read
Mining · 5 August 2026
Grade, Cut-off and the Arithmetic of an Open Pit
A gold mine is not a hole with gold in it. It is a spreadsheet with a hole attached — and the single number that decides which rock is ore and which rock is waste moves every time the price does. · Mo…
Amara Okonjo · 16 min read
