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Mercury dimes and Roosevelt dimes are the two 90% silver dimes you’ll run into most often as a stacker, and they contain exactly the same amount of silver. So which one should you actually buy? The answer comes down to premium, not metal content.
Same Silver Content, Different Coin
Both Mercury dimes and pre-1965 Roosevelt dimes are struck in 90% silver with an identical Actual Silver Weight (ASW) of 0.0723 troy oz. Coin-for-coin, their melt value is exactly the same — plug either one into our Junk Silver Melt Value Calculator and you’ll get the same number. The real difference between them isn’t silver content at all — it’s the premium you’ll pay above that melt value.
What Is a Mercury Dime?
- Officially the “Winged Liberty Head” dime, minted 1916–1945, nicknamed “Mercury” for its resemblance to the Roman god on the obverse.
- Certain key dates — 1916-D, 1921, 1921-D, and the 1942/1 overdate among them — carry real numismatic premiums well above melt value.
- Common-date, circulated Mercury dimes (the vast majority you’ll encounter in bulk junk silver bags) usually trade close to straight melt/junk silver pricing.
What Is a Roosevelt Dime?
- Minted starting in 1946; only the 1946–1964 issues are 90% silver. 1965 and later Roosevelt dimes are copper-nickel clad and contain no silver at all.
- Roosevelt dimes generally have far fewer sought-after key dates than Mercury dimes, so they’re more likely to trade at close to pure melt value with little collector premium either way.
- Always check the date before buying: a post-1964 Roosevelt dime looks nearly identical to a silver one at a glance but is worth face value only.
Which Is Better for Stacking Silver?
- For pure stacking (silver content only): Roosevelt dimes are usually the more efficient buy — with fewer key dates driving up demand, they tend to sit closer to melt value, so you pay less premium per ounce of silver.
- For a mix of stacking and upside potential: Common-date Mercury dimes cost about the same as Roosevelt dimes, but a percentage of any bulk bag may turn out to be a better date worth more than melt — a modest bonus most Roosevelt dime bags won’t offer.
- For simplicity: If you’re buying in bulk (rolls or bags) purely for melt value, either coin works — just confirm with the dealer whether the batch has been picked over for key dates, since a picked-over bag of Mercury dimes offers no real advantage over Roosevelt dimes.
Bottom line: don’t overthink it. If you’re buying by the roll or bag for melt value, Roosevelt dimes are the straightforward, low-drama choice. If you enjoy the coin-collecting side of the hobby and don’t mind sorting through change, common Mercury dimes cost about the same and carry a small chance of a pleasant surprise.