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3 results for “Troy ounce” in Science
Science · 9 August 2026
The Metallurgy of Karat
…y adding base metal at home changes the composition unevenly, will not pass assay, and destroys any hallmark already on the piece. Karat conversion is a refiner's job, done by melting, assaying and re-alloying from scratch, then resubmitting for a fresh hallmark. · Does higher ka…
Tomas Herrera · 17 min read
Science · 8 August 2026
The Metal That Went Medical
…t the nanometre scale does something no other convenient material does as reliably: it announces its own state, in colour, to the naked eye. · Why small gold is red · A bulk gold surface reflects. A gold particle twenty nanometres across — smaller than the wavelength of visible l…
Amara Okonjo · 19 min read
Science · 10 August 2026
Where Gold Actually Comes From
…once by accretion and never replenished — is what tells explorers that every discoverable ounce is the product of subsequent concentration, not of some deeper reservoir waiting to be tapped by drilling further. · That reframes the entire economics of mineral exploration. A compan…
Tomas Herrera · 17 min read
