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3 results for “metal detecting finds” in Science
Science · 8 August 2026
The Metal That Went Medical
…a trivial share of global supply — the value is in the surface chemistry, not the mass of metal. · Why is colloidal gold red instead of gold-coloured? Because at nanometre scale the metal interacts with light through localised surface plasmon resonance rather than bulk reflection…
Amara Okonjo · 15 min read
Science · 9 August 2026
The Metallurgy of Karat
…partners: copper pushes red, silver pushes green-yellow, palladium and nickel bleach the metal towards white. · Almost all commercial white gold is rhodium-plated; the plating is a wear item measured in years, not a permanent finish. · Nickel white golds are restricted in the EU…
Tomas Herrera · 16 min read
Science · 10 August 2026
Where Gold Actually Comes From
…change the gold market? Not on any timescale a reserve manager needs to plan around. The metal-rich asteroids that get cited contain gold at concentrations comparable to good terrestrial ore, and the binding constraint is the cost of retrieving mass from orbit, not the grade. ·…
Tomas Herrera · 18 min read
