So I've been looking into what platinum is actually used for, and honestly it's way more interesting than most people realize. Everyone thinks of gold when precious metals come up, but platinum? That's where the real industrial story is.

Here's the thing - platinum might not get as much hype as gold, but it's the third most-traded precious metal globally, and understanding what platinum is used for actually gives you solid insight into supply and demand dynamics. Let me break down the four main areas where platinum really matters.

First up is automotive. Autocatalysts in catalytic converters are probably the biggest driver of platinum demand. These things have been standard since the mid-70s in the US and Japan, and now over 95 percent of new vehicles have them. They're basically converting over 90 percent of the nasty stuff in exhaust - hydrocarbons, carbon monoxide - into harmless gases. As emission standards get tighter, this isn't going away. Back in 2024, automotive demand was running around 3.17 million ounces, with projections climbing to 3.25 million by 2025. That's real structural demand.

Then there's jewelry. Platinum's got properties that make it perfect for this - it's durable, doesn't tarnish, handles heating and cooling without getting brittle. Historically it's been used for thousands of years, but China is really the dominant market now. Jewelry demand was tracking toward 1.95 million ounces in 2024, expected to edge up to 1.98 million the following year. Interesting thing here is that platinum jewelry often costs more than gold jewelry, even though platinum itself trades cheaper per ounce.

The industrial side is massive and honestly gets overlooked. Platinum catalysts help manufacture fertilizers, it's in hard drives, electronics, dental work, glass equipment, sensors. Because it reacts to oxygen and nitrogen oxides, it's used for detecting pollutants in vehicles and buildings. Medical sensors use it too for measuring blood gases. Industrial demand including medical was projected at 2.43 million ounces in 2024, though that was expected to dip to 2.22 million in 2025.

Medical applications are their own category worth noting. Platinum goes into catheters, stents, neuromodulation devices. The biocompatibility and inertness make it ideal for implants. Plus it's a key component in cancer drugs like cisplatin and carboplatin. Medical demand has been climbing, hitting around 303,000 ounces in 2024 with forecasts to 314,000 in 2025.

Now here's where it gets interesting for investors. Throughout 2024, platinum was bouncing between $900 and $1,100 per ounce. There's this weird dynamic where supply is actually tight - South Africa's dealing with electricity and rail issues, COVID hangover effects are still rippling through, and Russia's situation impacts their production. But demand has been soft because of economic pressures, especially in auto. Electric vehicles have also cut into demand since they don't need those platinum-heavy catalytic converters.

The gold versus platinum thing is worth understanding too. Platinum's 30 times rarer than gold and harder to mine, but gold trades at more than double the price. Historically platinum traded at par or premium to gold, but since 2015 they've diverged pretty sharply. That's mainly because gold's got that safe-haven appeal during uncertain times, while platinum lives and dies by industrial and jewelry demand. Interestingly, this has actually pushed some people toward platinum jewelry as a cheaper alternative to gold.

If you're thinking about what platinum is used for from an investment angle, the key is understanding that structural demand from autocatalysts and industry keeps a floor under the market. But it's also more cyclical than gold, which means timing matters more. Worth keeping on your radar if you're building a precious metals position, especially if you think industrial demand will pick back up.