Key Takeaways
- Over the 40 years ending mid-2025, the S&P 500 returned roughly 11% annualized with dividends reinvested. Gold returned roughly 5–6% annualized over the same period. Meaningful, but less than half the equity return, with no income along the way.
- Platinum has traded below gold since 2015 and sits near $1,000/oz as of mid-2026, while gold trades above $3,200/oz. Rarity alone does not set price. Industrial demand, mining supply, and market depth all matter more in practice.
- Rhodium is technically more expensive than gold per ounce in some markets, but the spread between bid and ask can run 10–20% and the market is thin enough that large positions move the price. It is a commodity input, not a liquid savings vehicle.
- Diamonds are not worth more than gold on any comparable unit basis in the secondary market. The retail markup on a diamond runs 50–200% above wholesale; resale recovers a fraction. Gold trades near spot globally. The liquidity gap alone makes them incomparable as stores of value.
- Compare Gold IRA companies and fees before putting any retirement dollars into physical metal. The dealer spread, custodian fee, and storage cost can put you down 10–15% before gold moves an inch.
The Short Version: Gold Is a Store of Value, Not a Return Engine
If you want to know whether gold beats stocks, the 40-year answer is no. If you want to know whether gold beats platinum or rhodium or diamonds as a place to park wealth, the answer is also yes. But for reasons that have nothing to do with which metal is rarest or most expensive per ounce.
This piece runs through the actual comparisons you searched for. Gold versus the S&P 500. Gold versus platinum. Rhodium versus gold. Whether platinum is rarer than gold and whether that matters. And whether diamonds are worth more than gold in any way that’s useful to know.
The numbers are real. So are the traps.
Gold vs. the S&P 500: The 40-Year Verdict
From January 1985 through mid-2025, the S&P 500 returned roughly 11% annualized with dividends reinvested. Gold returned roughly 5–6% annualized over the same period. That gap compounds. A $10,000 investment in the S&P 500 in 1985, with dividends reinvested, grew to somewhere north of $800,000 by 2025. The same $10,000 in gold grew to roughly $75,000–$85,000.
Gold had its decade. From 2000 to 2010, equities were essentially flat in real terms and gold tripled. Anyone who made a comparison in 2010 got a very different answer. That’s the thing about asset comparisons. The time window does most of the work.
The practical difference is income. The S&P 500 pays dividends. Gold pays nothing. When you hold gold, your total return is the price change, period. A stock portfolio compounds both price appreciation and income. Over 40 years, that income-reinvestment effect accounts for a substantial share of the equity advantage.
Gold does something equities don’t, though. In the 2008 crisis, gold held its value while equities fell 50%. In the early 2020 COVID crash, gold was briefly up while equities fell 30%. That’s the argument for holding some gold. Not that it returns more, but that it doesn’t move in lockstep with stocks when stocks are falling hardest. A 5–10% allocation to gold in a diversified portfolio has historically reduced portfolio volatility without gutting total return. That’s a real benefit. It’s just not the same benefit as higher returns.
Gold vs. Platinum: Rarity Doesn’t Set Price
Platinum is geologically rarer than gold. Annual global platinum mining production runs roughly 180–200 metric tons. Gold mining production runs roughly 3,300 metric tons per year. By that measure, platinum is about 15 to 18 times rarer out of the ground.
And yet platinum has traded below gold since roughly 2015. As of mid-2026, platinum sits near $1,000/oz. Gold sits above $3,200/oz.
The reason is demand structure. Gold’s demand is dominated by jewelry (roughly 50%), central bank purchases, and investment demand. All relatively price-insensitive and stable. Platinum’s demand is dominated by automotive catalytic converters, which means it tracks auto production cycles, emissions regulation timelines, and the long-run shift toward electric vehicles (EVs don’t use platinum catalysts). When EV adoption expectations rose after 2015, platinum’s industrial demand outlook weakened, and the price followed.
The lesson from platinum is one worth keeping: rarity is a geological fact. Price is a market fact. The two don’t have to match.
For investors, platinum has occasionally been pitched as “cheap gold” when the platinum-to-gold ratio is historically wide. That spread has been historically wide for a decade now. The thesis that platinum will re-rate back toward gold prices requires an industrial demand catalyst. Specifically, stronger-than-expected combustion engine demand or new industrial applications. That hasn’t materialized. That’s a speculative bet on supply and demand timing, not a simple “buy the cheaper rare metal” trade.
Rhodium: More Expensive Than Gold, Far Less Useful as a Savings Vehicle
Rhodium hit roughly $29,000/oz in early 2021. Gold was trading near $1,800/oz at the same time. Headlines ran with comparisons. The story was simpler than those headlines suggested.
Global rhodium production runs under 30 metric tons per year, almost entirely as a byproduct of platinum mining in South Africa. Nearly all of it goes to automotive catalytic converters. When stricter emissions standards pushed automakers to use more rhodium per vehicle in 2020–2021, demand spiked against a supply that couldn’t quickly grow. Price exploded. By 2024, with auto production normalizing and some demand substitution underway, rhodium fell below $5,000/oz.
The fine print on rhodium as an investment says everything you need to know: the bid-ask spread on physical rhodium commonly runs 15–20%. You buy at spot plus the dealer’s markup, and you sell at spot minus the dealer’s discount. That’s a round-trip friction cost that can easily exceed 20% before the metal moves. The market is thin enough that a meaningful individual position can move the price of available supply. And there is no liquid secondary market comparable to gold’s global spot market.
Anyone who read the terms on a rhodium purchase in 2020–2021 and compared the fill price to that day’s spot price would have seen the spread baked into the transaction. That spread is not a fee line item. It’s in the fill price. The annual statement doesn’t show it.
Rhodium is an industrial commodity input that occasionally becomes extraordinarily expensive due to a specific supply-demand imbalance. It’s not a savings vehicle. It’s not a wealth-preservation tool. It’s what gets used in your car’s emissions system.
Is Gold Worth More Than Diamonds? Comparing the Uncomparable
The comparison trips people up because both are sold as luxury goods and both carry cultural associations with value and permanence. The numbers pull them apart quickly.
A one-carat round diamond of good quality (G color, VS2 clarity) retails for roughly $4,000–$7,000 depending on cut and certification. Gold at $3,200/oz per troy ounce means one troy ounce costs $3,200. A weight that’s about 31 grams. On a per-gram or per-unit basis, high-quality diamonds can retail above gold.
But the comparison breaks at resale. Gold trades against a transparent global spot price 24 hours a day. A reputable dealer buys gold at a small discount to spot. Commonly 1–5% below. You can sell an ounce of gold in most cities in the world today and get close to the market price.
Diamonds don’t work that way. The retail markup on a diamond purchase commonly runs 50–200% above wholesale. When you sell a diamond back to a jeweler or through a resale platform, you recover roughly 20–50 cents on the retail dollar in most cases. The price the jeweler quoted you on the way in was not the market price. It was a retail price that includes margin, the store, the salesperson, and the ring setting.
The IRS doesn’t treat diamonds as monetary assets. The SEC doesn’t regulate diamond dealers. FINRA doesn’t touch them. There’s no central exchange setting a transparent diamond spot price the way London’s LBMA sets a gold price twice a day. Diamond pricing depends on the four Cs (cut, color, clarity, carat) and who’s buying. And that subjectivity is exactly why diamonds aren’t comparable to gold as a store of financial value.
For retirement-account purposes: diamonds are collectibles under IRC §408(m). They cannot be held in an IRA. Gold bullion that meets IRS purity requirements can be held in a self-directed IRA, which is a meaningful structural difference.
What Holding Physical Gold Actually Costs
If you’ve searched any of these comparisons recently, you’ve probably seen ads for Gold IRAs. The comparison matters here, because how you own gold changes its real return.
A gold ETF. Funds like GLD or IAU. Holds physical gold allocated to shareholders and charges an expense ratio around 0.10–0.25% annually. You buy shares through a standard brokerage account at or near spot price. The bid-ask spread on a liquid ETF is a few cents. You can sell in seconds during market hours.
A Gold IRA requires a self-directed IRA custodian (typically a company like Equity Trust or STRATA Trust, not a big-box brokerage), an IRS-approved depository for physical storage (Delaware Depository and Brink’s are common), and purchase through an approved dealer. The IRS mandates all of this under the rules governing self-directed IRAs. You cannot store the metal at home. “home storage IRA” pitches are an IRS compliance red flag that the agency has specifically warned about in published guidance.
The fee stack on a Gold IRA typically looks like this: a one-time account setup fee of $50–$200, an annual custodian fee of $100–$300, an annual storage fee of $100–$200 at the depository, and a dealer markup over spot that varies by dealer and product type. Common gold coins carry markups of 3–8% over spot. Premium or proof coins can run significantly higher. That markup isn’t an itemized fee on your statement. It’s in the fill price on the day you buy.
On a $10,000 gold purchase inside a Gold IRA with a 5% dealer markup and $400 in annual fees, you’re down roughly $900 in year one before gold moves a dollar. The gold has to appreciate 9% just to break even on cost. Meanwhile, the ETF route costs roughly $25 in the same year on the same balance.
That math is the main thing most best gold IRA companies reviews don’t put up front. Total-cost comparison. Dealer spread plus annual fees, measured against ETF alternatives. Is the number that actually matters for your return.
If your goal is gold exposure in a retirement account and your balance is under $50,000, the ETF is the straightforward answer. The Gold IRA structure makes more sense for someone with a large existing IRA balance who specifically wants allocated physical metal held in their name at an approved depository, and who understands the fee stack going in.
The Diversification Question: When Gold Actually Helps
The strongest case for gold isn’t that it outperforms stocks or beats other metals on some rarity metric. It’s correlation. Gold’s correlation to the S&P 500 over long periods runs near zero or slightly negative. Meaning gold tends not to fall at the same time stocks fall, and sometimes rises when stocks fall hardest.
For someone within ten years of retirement, that low correlation has practical value. A portfolio that falls 50% forces a retiree to sell assets at the worst possible time to fund living expenses. A portfolio with 5–10% in gold that falls 38% instead of 50% might allow the retiree to draw from the gold allocation while waiting for equities to recover. That sequencing-of-returns protection is real, and it’s a more defensible reason to hold gold than any price comparison.
A financial advisor who runs correlation analysis on your specific portfolio can tell you whether adding gold actually reduces your portfolio’s worst-case drawdown or just adds cost and complexity. For a simple two-fund index portfolio held by someone in their 30s or 40s, gold adds little the bond allocation isn’t already doing. For someone concentrated in equities near retirement age, a small allocation might genuinely help.
The answer depends on the portfolio, not on which metal sounds most impressive or which one the mailer in your mailbox is promoting this month.
