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Electrical Conductivity
Silver is the most electrically conductive element — but only marginally better than copper. Silver's conductivity is approximately 105% of copper's. The small advantage is not worth the enormous cost difference: silver trades at roughly 80-100 times the price of copper per kilogram. Copper's conductivity, combined with its relative abundance and price, makes it the default material for virtually all electrical applications.
Gold is a distant third in conductivity but is used in electronics for its corrosion resistance — gold-plated contacts in high-reliability applications (space hardware, premium audio connectors, medical devices) are valued not for conductivity but for resistance to oxidation. A gold contact that works perfectly in 30 years is worth the cost premium in specific applications. For general electrical wiring, copper is unquestionably the right choice.
Relative Abundance
Copper is far more abundant in the Earth's crust than either gold or silver. The Earth's crust contains approximately 50 parts per million of copper, compared to 0.004 ppm of gold and 0.07 ppm of silver. This abundance difference is a key reason copper costs roughly $9,000-10,000 per tonne while gold costs approximately $60,000,000 per tonne — a 6,000× price difference that reflects rarity, not usefulness.
Despite being much more abundant than precious metals, copper is not unlimited. The shift to renewable energy and electric vehicles is projected to create copper supply constraints over the coming decade, driving investment in new mining capacity and recycling infrastructure.
Industrial Importance
By virtually any measure of industrial importance, copper exceeds both gold and silver. Approximately 28 million tonnes of copper are consumed annually, compared to roughly 27,000 tonnes of gold and 30,000 tonnes of silver. Copper is essential to electrical systems, construction, transportation, and electronics in ways that gold and silver are not. A world without gold would be poorer and less beautiful; a world without copper would be unable to generate or distribute electricity.
This is the metal Ea-Nasir was trading. Not gold. Not silver. Copper — the unglamorous workhorse of ancient and modern civilisation alike. When Nanni's copper arrived substandard, it wasn't a luxury purchase that had gone wrong. It was the material his craftsmen needed to make the tools and implements that kept the city functioning. Bad copper was a serious problem.
Frequently Asked Questions
Yes — copper is more electrically conductive than gold. Silver is the only metal more conductive than copper, and only marginally so (~5% better). Gold is used in electronics for corrosion resistance, not conductivity.
Silver is approximately 80-100 times more expensive than copper per kilogram, while only being marginally more conductive. The cost difference is not justified by the conductivity improvement for standard electrical applications.
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