Platinum, palladium, iridium, rhodium, ruthenium, osmium — six metals that catalyze your car's exhaust, your refinery's chemistry, and a growing share of the hydrogen economy. They are scarce in Earth's crust for a precise geochemical reason, abundant in certain asteroids for the same reason inverted, and they anchor the most seductive — and most economically treacherous — pitch in the space-resources industry.
Sunk treasure
The platinum-group metals are strongly siderophile: they dissolve readily into molten iron. When the early Earth differentiated and iron rained down into the core, the PGMs went with it — almost the planet's entire original endowment is locked 3,000 kilometers down. The deposits we mine, concentrated in a handful of districts like South Africa's Bushveld complex, derive largely from material delivered by impacts after core formation, plus rare magmatic concentration events. A telling clue: iridium is so scarce in crustal rock that a thin iridium-rich layer in the geological record was the smoking gun for the asteroid impact that ended the Cretaceous.
Asteroids tell the inverted story. Bodies that never differentiated never sequestered their PGMs; and M-type asteroids — interpreted as exposed cores of shattered protoplanets — are the sequestration layer itself, sitting in open space. Estimates suggest some metallic asteroids carry PGM concentrations exceeding the richest terrestrial ores. These are estimates from meteorite samples and remote sensing, not assays; no one has ground-truthed an M-type body yet.
The supply-elasticity trap
Here is the problem with "a single asteroid contains trillions of dollars of platinum": the valuation assumes current prices, and current prices assume current scarcity. Annual world platinum production is on the order of 200 tonnes. Return even 100 tonnes in one campaign and you have not earned the spot price times 100 tonnes — you have crashed the spot price. The more successfully you mine, the less each kilogram is worth. Every asteroid-mining business case must answer this trap, and most of the famous headline numbers simply ignore it. The honest versions model demand elasticity: at much lower prices, platinum-group catalysts would find vastly larger markets — but on a timeline measured in decades, not one funding round.
What actually changed
The variable that genuinely moved is launch cost. Shuttle-era access to low Earth orbit ran on the order of $54,000 per kilogram; Falcon Heavy-class pricing is roughly $1,500 per kilogram — a ~30x compression, with full reusability promising more. Cheap launch does not rescue the platinum-to-Earth story by itself, but it collapses the cost of getting prospecting and processing hardware out to the targets, which moves the entire industry from fiction toward engineering.
Why it matters to a builder
PGMs are the canonical case study in second-order market thinking: the resource is real, the concentration claims are plausible, and the naive revenue model still self-destructs, because supply at that scale is not price-taking. Whenever your plan's success would change the conditions the plan assumed, you are in the trap. The builders who survive it sell into elastic demand — or, as the volatiles players concluded, sell something space itself needs.