Search
Search the whole magazine.
Full-text search across every article — headlines, decks, body copy, pull quotes, captions and FAQs — plus our editorial and legal policies.
3 results for “metal detecting finds” in Mining
Mining · 5 August 2026
Grade, Cut-off and the Arithmetic of an Open Pit
…gold ore is typically around one to two grams per tonne — roughly a gold ring's worth of metal in a truckload of rock. · Cut-off grade is a price-dependent accounting decision, not a geological fact: a higher gold price literally converts waste into ore. · Strip ratio — waste to…
Amara Okonjo · 20 min read
Mining · 22 May 2026
The Other Supply Chain: Artisanal Mining and the Mercury Problem
…the technology than by upfront cost, training and the fact that mercury delivers visible metal the same day. · Is artisanal gold ever sold into the formal market? Frequently. Metal moves from site buyers to regional traders to exporters and refiners, and by the time it is cast i…
Amara Okonjo · 15 min read
Mining · 19 August 2026
Nine Grams a Tonne
…ing roughly a tonne of rock must be moved and processed for every wedding ring's worth of metal. · Energy typically accounts for a fifth to a third of a mine's operating cost, and diesel price swings move margins more than most miners' hedging books can absorb. · Water scarcity,…
Amara Okonjo · 18 min read
